Bump sprockets from 3.7.1 to 3.7.2

Gemfile.lock

@@ -75,10 +75,8 @@ GEM
     coffee-script-source (1.12.2)
     collectiveaccess (0.2.3)
       httparty (~> 0.13)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.6)
     crass (1.0.3)
-    deprecation (1.0.0)
-      activesupport
     devise (4.4.1)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -205,7 +203,7 @@ GEM
     public_suffix (3.0.1)
     pundit (1.1.0)
       activesupport (>= 3.0.0)
-    rack (1.6.8)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.6)
@@ -247,9 +245,8 @@ GEM
     responders (2.4.0)
       actionpack (>= 4.2.0, < 5.3)
       railties (>= 4.2.0, < 5.3)
-    riiif (1.7.0)
-      deprecation (>= 1.0.0)
-      railties (>= 4.2, < 6)
+    riiif (0.4.1)
+      rails (> 3.2.0)
     rolify (5.2.0)
     roo (2.5.1)
       nokogiri (~> 1)
@@ -275,7 +272,7 @@ GEM
       activemodel (> 4, < 5.2)
     spreadsheet (1.1.5)
       ruby-ole (>= 1.0)
-    sprockets (3.7.1)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.1)
@@ -345,7 +342,7 @@ DEPENDENCIES
   rails4-autocomplete
   ratyrate
   recaptcha
-  riiif
+  riiif (= 0.4.1)
   rolify
   roo (~> 2.5.0)
   sass-rails