Update gem dependencies

Gemfile.lock

@@ -8,7 +8,7 @@ GEM
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     backports (3.6.4)
-    better_errors (2.1.0)
+    better_errors (2.1.1)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
       rack (>= 0.9.0)
@@ -31,10 +31,10 @@ GEM
       activesupport (>= 2)
       nokogiri (~> 1.4)
     i18n (0.7.0)
-    json (1.8.1)
+    json (1.8.2)
     method_source (0.8.2)
     mini_portile (0.6.2)
-    minitest (5.5.0)
+    minitest (5.5.1)
     multi_json (1.10.1)
     nokogiri (1.6.5)
       mini_portile (~> 0.6.0)
@@ -49,7 +49,7 @@ GEM
     rack (1.6.0)
     rack-protection (1.5.3)
       rack
-    rack-test (0.6.2)
+    rack-test (0.6.3)
       rack (>= 1.0)
     rr (1.1.2)
     sass (3.4.9)
@@ -79,11 +79,11 @@ GEM
     thor (0.19.1)
     thread_safe (0.3.4)
     tilt (1.4.1)
-    typhoeus (0.6.9)
+    typhoeus (0.7.0)
       ethon (>= 0.7.1)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (2.6.1)
+    uglifier (2.7.0)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
     unix_utils (0.0.15)