diff --git a/package-lock.json b/package-lock.json
index 8f0d552..da3d562 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,216 @@
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@@ -6029,44 +6393,68 @@
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-      "integrity": "sha1-9f+qXs0pyzHAR0vKfXVra7KePyg=",
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-        "normalize-package-data": "2.4.0",
-        "path-type": "1.1.0"
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-      "integrity": "sha1-nWPBMnbAZZGNV/ACpX9AobZD+wI=",
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-        "read-pkg": "1.1.0"
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-          "integrity": "sha1-ay6YIrGizgpgq2TWEOzK1TyyTQ8=",
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-            "path-exists": "2.1.0",
-            "pinkie-promise": "2.0.1"
+            "locate-path": "^3.0.0"
           }
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-        "path-exists": {
+        "locate-path": {
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+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
+          "integrity": "sha512-7AO748wWnIhNqAuaty2ZWHkQHRSNfPVIsPIfwEOWO22AmaoVrWavlOcMR5nzTLNYvp36X220/maaRsrec1G65A==",
+          "dev": true,
+          "requires": {
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
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+        "p-limit": {
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-          "integrity": "sha1-D+tsZPD8UY2adU3V77YscCJ2H0s=",
+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.1.0.tgz",
+          "integrity": "sha512-NhURkNcrVB+8hNfLuysU8enY5xn2KXphsHBaC2YmRNTZRc7RWusw6apSpdEj3jo4CMb6W9nrF6tTnsJsJeyu6g==",
           "dev": true,
           "requires": {
-            "pinkie-promise": "2.0.1"
+            "p-try": "^2.0.0"
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+        },
+        "p-locate": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
+          "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
+          "dev": true,
+          "requires": {
+            "p-limit": "^2.0.0"
+          }
+        },
+        "p-try": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.0.0.tgz",
+          "integrity": "sha512-hMp0onDKIajHfIkdRk3P4CdCmErkYAxxDtP3Wx/4nZ3aGlau2VKh3mZpcuFkH27WQkL/3WBCPOktzA9ZOAnMQQ==",
+          "dev": true
         }
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@@ -6126,6 +6514,7 @@
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       "dev": true,
+      "optional": true,
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@@ -6180,7 +6569,8 @@
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       "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc=",
-      "dev": true
+      "dev": true,
+      "optional": true
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     "repeating": {
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@@ -6349,27 +6739,27 @@
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-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-4.4.2.tgz",
-      "integrity": "sha512-cpOHpnRyY3Dk9dTHBYMfVBB0HUCSKIpxW07X6OGW2NiYPovs4AkcL8Q8MzecbAROjbfRA9esJCmlZgikxDz7DA==",
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-5.1.1.tgz",
+      "integrity": "sha512-h/3uHscbt5pQNxkf7Y/Lb9/OM44YNCicHakcq73ncbrIS8lXg+ZGOZbtuU+/km4YnyiCYfQQEwANaReJz7KDfw==",
       "dev": true,
       "requires": {
-        "@sinonjs/formatio": "2.0.0",
-        "diff": "3.3.1",
-        "lodash.get": "4.4.2",
-        "lolex": "2.3.2",
-        "nise": "1.2.6",
-        "supports-color": "5.2.0",
-        "type-detect": "4.0.8"
+        "@sinonjs/formatio": "^2.0.0",
+        "diff": "^3.5.0",
+        "lodash.get": "^4.4.2",
+        "lolex": "^2.4.2",
+        "nise": "^1.3.3",
+        "supports-color": "^5.4.0",
+        "type-detect": "^4.0.8"
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-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.2.0.tgz",
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+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
           "dev": true,
           "requires": {
-            "has-flag": "3.0.0"
+            "has-flag": "^3.0.0"
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@@ -6547,13 +6937,10 @@
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-      "integrity": "sha1-YhmoVhZSBJHzV4i9vxRHqZx+aw4=",
-      "dev": true,
-      "requires": {
-        "is-utf8": "0.2.1"
-      }
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
+      "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
+      "dev": true
     },
     "strip-json-comments": {
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@@ -6637,16 +7024,15 @@
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-      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-4.2.0.tgz",
-      "integrity": "sha512-8hMFzjxbPv6xSlwGhXSvOMJ/vTy3bkng+2pxmf6E1z6VF7I9nIyNfvHtaw+NBPgvz647gADBbMSbwLfZYppT/w==",
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-5.1.0.tgz",
+      "integrity": "sha512-gwf0S2fFsANC55fSeSqpb8BYk6w3FDvwZxfNjeF6FRgvFa43r+7wRiA/Q0IxoRU37wB/LE8IQ4221BsNucTaCA==",
       "dev": true,
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-        "arrify": "1.0.1",
-        "micromatch": "2.3.11",
-        "object-assign": "4.1.1",
-        "read-pkg-up": "1.0.1",
-        "require-main-filename": "1.0.1"
+        "arrify": "^1.0.1",
+        "minimatch": "^3.0.4",
+        "read-pkg-up": "^4.0.0",
+        "require-main-filename": "^1.0.1"
       }
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     "text-encoding": {
diff --git a/package.json b/package.json
index 2b0ff3c..27303ee 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
   "devDependencies": {
     "babel-cli": "^6.26.0",
     "babel-core": "^6.26.0",
-    "babel-plugin-istanbul": "^4.1.5",
+    "babel-plugin-istanbul": "^5.1.1",
     "babel-preset-env": "^1.6.1",
     "babel-register": "^6.26.0",
     "chai": "^4.1.2",