Upgrade sprockets

Gemfile

@@ -4,6 +4,6 @@ source 'https://rubygems.org'
 gem 'middleman', '~>4.0.0'
 gem 'middleman-syntax', '~> 3.0.0'
 gem 'middleman-autoprefixer', '~> 2.7.0'
-gem "middleman-sprockets", "~> 4.0.0.rc"
+gem "middleman-sprockets", "~> 4.0.0"
 gem 'rouge', '~> 2.0.5'
 gem 'redcarpet', '~> 3.3.2'

Gemfile.lock

@@ -1,17 +1,16 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.5.1)
+    activesupport (4.2.7.1)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     addressable (2.4.0)
-    autoprefixer-rails (6.3.1)
+    autoprefixer-rails (6.4.1)
       execjs
-      json
-    backports (3.6.7)
+    backports (3.6.8)
     capybara (2.5.0)
       mime-types (>= 1.16)
       nokogiri (>= 1.3.3)
@@ -27,21 +26,22 @@ GEM
     concurrent-ruby (0.9.2)
     contracts (0.12.0)
     erubis (2.7.0)
-    execjs (2.6.0)
+    execjs (2.7.0)
     fastimage (1.8.1)
       addressable (~> 2.3, >= 2.3.5)
-    ffi (1.9.10)
+    ffi (1.9.14)
     haml (4.0.7)
       tilt
     hamster (2.0.0)
       concurrent-ruby (~> 0.8)
-    hashie (3.4.3)
+    hashie (3.4.4)
     i18n (0.7.0)
     json (1.8.3)
-    kramdown (1.9.0)
-    listen (3.0.5)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9)
+    kramdown (1.12.0)
+    listen (3.1.5)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+      ruby_dep (~> 1.2)
     middleman (4.0.0)
       coffee-script (~> 2.2)
       compass-import-once (= 1.0.5)
@@ -74,34 +74,37 @@ GEM
       sass (>= 3.4)
       tilt (~> 1.4.1)
       uglifier (~> 2.6)
-    middleman-sprockets (4.0.0.rc.1)
-      middleman-core (>= 4.0.0.rc.1)
-      sprockets (~> 3.0)
+    middleman-sprockets (4.0.0)
+      middleman-core (~> 4.0)
+      sprockets (>= 3.0)
     middleman-syntax (3.0.0)
       middleman-core (>= 3.2)
       rouge (~> 2.0)
-    mime-types (3.0)
+    mime-types (3.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2015.1120)
-    mini_portile2 (2.0.0)
-    minitest (5.8.4)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
-    padrino-helpers (0.13.1)
+    mime-types-data (3.2016.0521)
+    mini_portile2 (2.1.0)
+    minitest (5.9.0)
+    nokogiri (1.6.8)
+      mini_portile2 (~> 2.1.0)
+      pkg-config (~> 1.1.7)
+    padrino-helpers (0.13.3.1)
       i18n (~> 0.6, >= 0.6.7)
-      padrino-support (= 0.13.1)
-      tilt (~> 1.4.1)
-    padrino-support (0.13.1)
+      padrino-support (= 0.13.3.1)
+      tilt (>= 1.4.1, < 3)
+    padrino-support (0.13.3.1)
       activesupport (>= 3.1)
+    pkg-config (1.1.7)
     rack (1.6.4)
     rack-test (0.6.3)
       rack (>= 1.0)
     rb-fsevent (0.9.7)
-    rb-inotify (0.9.5)
+    rb-inotify (0.9.7)
       ffi (>= 0.5.0)
     redcarpet (3.3.4)
     rouge (2.0.5)
-    sass (3.4.21)
+    ruby_dep (1.4.0)
+    sass (3.4.22)
     sprockets (3.4.1)
       rack (> 1, < 3)
     thor (0.19.1)
@@ -121,7 +124,7 @@ PLATFORMS
 DEPENDENCIES
   middleman (~> 4.0.0)
   middleman-autoprefixer (~> 2.7.0)
-  middleman-sprockets (~> 4.0.0.rc)
+  middleman-sprockets (~> 4.0.0)
   middleman-syntax (~> 3.0.0)
   redcarpet (~> 3.3.2)
   rouge (~> 2.0.5)

config.rb

@@ -18,6 +18,8 @@
 # Activate the syntax highlighter
 activate :syntax
 
+activate :sprockets
+
 activate :autoprefixer do |config|
   config.browsers = ['last 2 version', 'Firefox ESR']
   config.cascade  = false