Upgraded sprockets, concurrent-ruby, brakeman gems

Gemfile.lock

@@ -49,15 +49,15 @@ GEM
       rack (>= 0.9.0)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
-    brakeman (3.1.2)
+    brakeman (3.1.3)
       erubis (~> 2.6)
       fastercsv (~> 1.5)
       haml (>= 3.0, < 5.0)
-      highline (~> 1.6)
+      highline (>= 1.6.20, < 2.0)
       multi_json (~> 1.2)
       ruby2ruby (>= 2.1.1, < 2.3.0)
       ruby_parser (~> 3.7.0)
-      safe_yaml
+      safe_yaml (>= 1.0)
       sass (~> 3.0)
       slim (>= 1.3.6, < 4.0)
       terminal-table (~> 1.4)
@@ -82,6 +82,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.10.0)
+    concurrent-ruby (1.0.0)
     crack (0.3.1)
     cucumber (1.3.20)
       builder (>= 2.1.2)
@@ -283,7 +284,8 @@ GEM
       temple (~> 0.7.3)
       tilt (>= 1.3.3, < 2.1)
     slop (3.6.0)
-    sprockets (3.4.1)
+    sprockets (3.5.0)
+      concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (2.3.3)
       actionpack (>= 3.0)