diff --git a/package-lock.json b/package-lock.json
index 118d3df..b25f77d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -26,6 +26,7 @@
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/@serialport/parser-delimiter/-/parser-delimiter-1.0.5.tgz",
       "integrity": "sha512-srDzeNwGM/GjtqK/nFDRIDpcZ6XDgkakFMXBtNDSI+XP6fqO1ynEZok8ljKJxM2ay0CNG83C6/X2xIOHvWhFYQ==",
+      "optional": true,
       "requires": {
         "safe-buffer": "5.1.1"
       }
@@ -124,6 +125,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-bgblack/-/ansi-bgblack-0.1.1.tgz",
       "integrity": "sha1-poulAHiHcBtqr74/oNrf36juPKI=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -132,6 +134,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-bgblue/-/ansi-bgblue-0.1.1.tgz",
       "integrity": "sha1-Z73ATtybm1J4lp2hlt6j11yMNhM=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -140,6 +143,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-bgcyan/-/ansi-bgcyan-0.1.1.tgz",
       "integrity": "sha1-WEiUJWAL3p9VBwaN2Wnr/bUP52g=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -148,6 +152,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-bggreen/-/ansi-bggreen-0.1.1.tgz",
       "integrity": "sha1-TjGRJIUplD9DIelr8THRwTgWr0k=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -156,6 +161,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-bgmagenta/-/ansi-bgmagenta-0.1.1.tgz",
       "integrity": "sha1-myhDLAduqpmUGGcqPvvhk5HCx6E=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -164,6 +170,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-bgred/-/ansi-bgred-0.1.1.tgz",
       "integrity": "sha1-p2+Sg4OCukMpCmwXeEJPmE1vEEE=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -172,6 +179,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-bgwhite/-/ansi-bgwhite-0.1.1.tgz",
       "integrity": "sha1-ZQRlE3elim7OzQMxmU5IAljhG6g=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -180,6 +188,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-bgyellow/-/ansi-bgyellow-0.1.1.tgz",
       "integrity": "sha1-w/4usIzUdmSAKeaHTRWgs49h1E8=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -188,6 +197,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-black/-/ansi-black-0.1.1.tgz",
       "integrity": "sha1-9hheiJNgslRaHsUMC/Bj/EMDJFM=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -196,6 +206,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-blue/-/ansi-blue-0.1.1.tgz",
       "integrity": "sha1-FbgEmQ6S/JyoxUds6PaZd3wh7b8=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -204,6 +215,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-bold/-/ansi-bold-0.1.1.tgz",
       "integrity": "sha1-PmOVCvWswq4uZw5vZ96xFdGl9QU=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -212,6 +224,7 @@
       "version": "0.2.0",
       "resolved": "http://registry.npmjs.org/ansi-colors/-/ansi-colors-0.2.0.tgz",
       "integrity": "sha1-csMd4qDZoszQysMMyYI+6y9kNLU=",
+      "optional": true,
       "requires": {
         "ansi-bgblack": "0.1.1",
         "ansi-bgblue": "0.1.1",
@@ -246,6 +259,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-cyan/-/ansi-cyan-0.1.1.tgz",
       "integrity": "sha1-U4rlKK+JgvKK4w2G8vF0VtJgmHM=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -254,6 +268,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-dim/-/ansi-dim-0.1.1.tgz",
       "integrity": "sha1-QN5MYDqoCG2Oeoa4/5mNXDbu/Ww=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -262,6 +277,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-gray/-/ansi-gray-0.1.1.tgz",
       "integrity": "sha1-KWLPVOyXksSFEKPetSRDaGHvclE=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -270,6 +286,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-green/-/ansi-green-0.1.1.tgz",
       "integrity": "sha1-il2al55FjVfEDjNYCzc5C44Q0Pc=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -278,6 +295,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-grey/-/ansi-grey-0.1.1.tgz",
       "integrity": "sha1-WdmLasK6GfilF5jphT+6eDOaM8E=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -286,6 +304,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-hidden/-/ansi-hidden-0.1.1.tgz",
       "integrity": "sha1-7WpMSY0rt8uyidvyqNHcyFZ/rg8=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -294,6 +313,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-inverse/-/ansi-inverse-0.1.1.tgz",
       "integrity": "sha1-tq9Fgm/oJr+1KKbHmIV5Q1XM0mk=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -302,6 +322,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-italic/-/ansi-italic-0.1.1.tgz",
       "integrity": "sha1-EEdDRj9iXBQqA2c5z4XtpoiYbyM=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -310,6 +331,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-magenta/-/ansi-magenta-0.1.1.tgz",
       "integrity": "sha1-BjtboW+z8j4c/aKwfAqJ3hHkMK4=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -318,6 +340,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-red/-/ansi-red-0.1.1.tgz",
       "integrity": "sha1-jGOPnRCAgAo1PJwoyKgcpHBdlGw=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -325,12 +348,14 @@
     "ansi-regex": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
+      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+      "optional": true
     },
     "ansi-reset": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-reset/-/ansi-reset-0.1.1.tgz",
       "integrity": "sha1-5+cSksPH3c1NYu9KbHwFmAkRw7c=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -339,6 +364,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-strikethrough/-/ansi-strikethrough-0.1.1.tgz",
       "integrity": "sha1-2Eh3FAss/wfRyT685pkE9oiF5Wg=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -365,6 +391,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-underline/-/ansi-underline-0.1.1.tgz",
       "integrity": "sha1-38kg9Ml7WXfqFi34/7mIMIqqcaQ=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -373,6 +400,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-white/-/ansi-white-0.1.1.tgz",
       "integrity": "sha1-nHe3wZPF7pkuYBHTbsTJIbRXiUQ=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -380,12 +408,14 @@
     "ansi-wrap": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/ansi-wrap/-/ansi-wrap-0.1.0.tgz",
-      "integrity": "sha1-qCJQ3bABXponyoLoLqYDu/pF768="
+      "integrity": "sha1-qCJQ3bABXponyoLoLqYDu/pF768=",
+      "optional": true
     },
     "ansi-yellow": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-yellow/-/ansi-yellow-0.1.1.tgz",
       "integrity": "sha1-y5NW8vRscy8OMZnmEClVp32oPB0=",
+      "optional": true,
       "requires": {
         "ansi-wrap": "0.1.0"
       }
@@ -581,9 +611,9 @@
       }
     },
     "bootstrap": {
-      "version": "4.1.3",
-      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-4.1.3.tgz",
-      "integrity": "sha512-rDFIzgXcof0jDyjNosjv4Sno77X4KuPeFxG2XZZv1/Kc8DRVGVADdoQyyOVDwPqL36DDmtCQbrpMCqvpPLJQ0w=="
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-4.3.1.tgz",
+      "integrity": "sha512-rXqOmH1VilAt2DyPzluTi2blhk17bO7ef+zLLPlWvG494pDxcM234pJ8wTc/6R40UWizAIIMgxjvxZg5kmsbag=="
     },
     "boxen": {
       "version": "1.3.0",
@@ -905,7 +935,8 @@
     "code-point-at": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
-      "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c="
+      "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
+      "optional": true
     },
     "collection-visit": {
       "version": "1.0.0",
@@ -970,7 +1001,8 @@
     "console-control-strings": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
-      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4="
+      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
+      "optional": true
     },
     "content-disposition": {
       "version": "0.5.2",
@@ -1120,6 +1152,7 @@
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
       "integrity": "sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==",
+      "optional": true,
       "requires": {
         "once": "1.4.0"
       }
@@ -1190,7 +1223,8 @@
     "error-symbol": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/error-symbol/-/error-symbol-0.1.0.tgz",
-      "integrity": "sha1-Ck2uN9YA0VopukU9jvkg8YRDM/Y="
+      "integrity": "sha1-Ck2uN9YA0VopukU9jvkg8YRDM/Y=",
+      "optional": true
     },
     "escape-html": {
       "version": "1.0.3",
@@ -1552,7 +1586,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -1573,12 +1608,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "1.0.0",
             "concat-map": "0.0.1"
@@ -1593,17 +1630,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -1720,7 +1760,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1732,6 +1773,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "1.0.1"
           }
@@ -1746,6 +1788,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "1.1.11"
           }
@@ -1753,12 +1796,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "5.1.1",
             "yallist": "3.0.2"
@@ -1777,6 +1822,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -1857,7 +1903,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -1869,6 +1916,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1.0.2"
           }
@@ -1954,7 +2002,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -1990,6 +2039,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "1.1.0",
             "is-fullwidth-code-point": "1.0.0",
@@ -2009,6 +2059,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "2.1.1"
           }
@@ -2052,12 +2103,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -2235,7 +2288,7 @@
     },
     "http-errors": {
       "version": "1.6.3",
-      "resolved": "http://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
+      "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
       "integrity": "sha1-i1VoC7S+KDoLW/TqLjhYC+HZMg0=",
       "requires": {
         "depd": "1.1.2",
@@ -2275,7 +2328,8 @@
     "info-symbol": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/info-symbol/-/info-symbol-0.1.0.tgz",
-      "integrity": "sha1-J4QdcoZ920JCzWEtecEGM4gcang="
+      "integrity": "sha1-J4QdcoZ920JCzWEtecEGM4gcang=",
+      "optional": true
     },
     "inherits": {
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@@ -2377,6 +2431,7 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
       "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+      "optional": true,
       "requires": {
         "number-is-nan": "1.0.1"
       }
@@ -2502,7 +2557,8 @@
     "koalas": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/koalas/-/koalas-1.0.2.tgz",
-      "integrity": "sha1-MYQz8HQjXbePrlZhoCqMpT7ilc0="
+      "integrity": "sha1-MYQz8HQjXbePrlZhoCqMpT7ilc0=",
+      "optional": true
     },
     "latest-version": {
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@@ -2517,6 +2573,7 @@
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/lazy-cache/-/lazy-cache-2.0.2.tgz",
       "integrity": "sha1-uRkKT5EzVGlIQIWfio9whNiCImQ=",
+      "optional": true,
       "requires": {
         "set-getter": "0.1.0"
       }
@@ -2535,6 +2592,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/log-ok/-/log-ok-0.1.1.tgz",
       "integrity": "sha1-vqPdNqzQuKckDXhza1uXxlREozQ=",
+      "optional": true,
       "requires": {
         "ansi-green": "0.1.1",
         "success-symbol": "0.1.0"
@@ -2544,6 +2602,7 @@
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/log-utils/-/log-utils-0.2.1.tgz",
       "integrity": "sha1-pMIXoN2aUFFdm5ICBgkas9TgMc8=",
+      "optional": true,
       "requires": {
         "ansi-colors": "0.2.0",
         "error-symbol": "0.1.0",
@@ -2761,6 +2820,7 @@
       "version": "0.5.1",
       "resolved": "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
       "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "optional": true,
       "requires": {
         "minimist": "0.0.8"
       },
@@ -2768,7 +2828,8 @@
         "minimist": {
           "version": "0.0.8",
           "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-          "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
+          "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
+          "optional": true
         }
       }
     },
@@ -2780,7 +2841,8 @@
     "mute-stream": {
       "version": "0.0.7",
       "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.7.tgz",
-      "integrity": "sha1-MHXOk7whuPq0PhvE2n6BFe0ee6s="
+      "integrity": "sha1-MHXOk7whuPq0PhvE2n6BFe0ee6s=",
+      "optional": true
     },
     "nan": {
       "version": "2.11.0",
@@ -2952,7 +3014,8 @@
     "number-is-nan": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.1.tgz",
-      "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0="
+      "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0=",
+      "optional": true
     },
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@@ -3047,6 +3110,7 @@
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       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
       "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "optional": true,
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       }
@@ -3293,7 +3357,8 @@
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           "version": "6.0.2",
           "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
-          "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA=="
+          "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
+          "optional": true
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         "shallow-clone": {
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@@ -3548,6 +3613,7 @@
       "version": "2.2.3",
       "resolved": "https://registry.npmjs.org/readline-utils/-/readline-utils-2.2.3.tgz",
       "integrity": "sha1-b4R9a48ZFcORtYHDZ81HhzhiNRo=",
+      "optional": true,
       "requires": {
         "arr-flatten": "1.1.0",
         "extend-shallow": "2.0.1",
@@ -3564,6 +3630,7 @@
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           "resolved": "https://registry.npmjs.org/is-number/-/is-number-3.0.0.tgz",
           "integrity": "sha1-JP1iAaR4LPUFYcgQJ2r8fRLXEZU=",
+          "optional": true,
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@@ -3787,6 +3854,7 @@
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       "integrity": "sha1-12nBgsnVpR9AkUXy+6guXoboA3Y=",
+      "optional": true,
       "requires": {
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@@ -4202,6 +4270,7 @@
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       "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+      "optional": true,
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@@ -4220,6 +4289,7 @@
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       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
       "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+      "optional": true,
       "requires": {
         "ansi-regex": "2.1.1"
       }
@@ -4227,7 +4297,8 @@
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       "resolved": "https://registry.npmjs.org/strip-color/-/strip-color-0.1.0.tgz",
-      "integrity": "sha1-EG9l09PmotlAHKwOsM6LinArT3s="
+      "integrity": "sha1-EG9l09PmotlAHKwOsM6LinArT3s=",
+      "optional": true
     },
     "strip-eof": {
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@@ -4243,7 +4314,8 @@
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       "resolved": "https://registry.npmjs.org/success-symbol/-/success-symbol-0.1.0.tgz",
-      "integrity": "sha1-JAIuSG878c3KCUKDt2nEctO3KJc="
+      "integrity": "sha1-JAIuSG878c3KCUKDt2nEctO3KJc=",
+      "optional": true
     },
     "supports-color": {
       "version": "4.5.0",
@@ -4326,7 +4398,8 @@
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       "resolved": "https://registry.npmjs.org/time-stamp/-/time-stamp-1.1.0.tgz",
-      "integrity": "sha1-dkpaEa9QVhkhsTPztE5hhofg9cM="
+      "integrity": "sha1-dkpaEa9QVhkhsTPztE5hhofg9cM=",
+      "optional": true
     },
     "timed-out": {
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@@ -4627,7 +4700,8 @@
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       "resolved": "https://registry.npmjs.org/warning-symbol/-/warning-symbol-0.1.0.tgz",
-      "integrity": "sha1-uzHdEbeg+dZ6su2V9Fe2WCW7rSE="
+      "integrity": "sha1-uzHdEbeg+dZ6su2V9Fe2WCW7rSE=",
+      "optional": true
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@@ -4699,6 +4773,7 @@
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       "resolved": "https://registry.npmjs.org/window-size/-/window-size-1.1.1.tgz",
       "integrity": "sha512-5D/9vujkmVQ7pSmc0SCBmHXbkv6eaHwXEx65MywhmUMsI8sGqJ972APq1lotfcwMKPFLuCFfL8xGHLIp7jaBmA==",
+      "optional": true,
       "requires": {
         "define-property": "1.0.0",
         "is-number": "3.0.0"
@@ -4708,6 +4783,7 @@
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/is-number/-/is-number-3.0.0.tgz",
           "integrity": "sha1-JP1iAaR4LPUFYcgQJ2r8fRLXEZU=",
+          "optional": true,
           "requires": {
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           }
@@ -4717,7 +4793,8 @@
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "optional": true
     },
     "write-file-atomic": {
       "version": "2.3.0",
diff --git a/package.json b/package.json
index a71c65f..c36e519 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "author": "Sigurd Sather Sorensen",
   "license": "ISC",
   "dependencies": {
-    "bootstrap": "^4.1.3",
+    "bootstrap": "^4.3.1",
     "ejs": "^2.6.1",
     "express": "^4.16.3",
     "johnny-five": "^1.0.0",