Update Gems. (circleci#231)

Author: FelicianoTech

Gemfile.lock

@@ -12,8 +12,8 @@ GEM
     colored (1.2)
     ethon (0.9.0)
       ffi (>= 1.3.0)
-    ffi (1.9.10)
-    html-proofer (3.0.5)
+    ffi (1.9.13)
+    html-proofer (3.0.6)
       activesupport (~> 4.2)
       addressable (~> 2.3)
       colored (~> 1.2)
@@ -23,7 +23,7 @@ GEM
       typhoeus (~> 0.7)
       yell (~> 2.0)
     i18n (0.7.0)
-    jekyll (3.1.3)
+    jekyll (3.1.6)
       colorator (~> 0.1)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 1.1)
@@ -39,19 +39,21 @@ GEM
     json (1.8.3)
     kramdown (1.11.1)
     liquid (3.0.6)
-    listen (3.0.7)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9.7)
+    listen (3.0.8)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     mercenary (0.3.6)
-    mini_portile2 (2.0.0)
-    minitest (5.8.4)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
-    parallel (1.8.0)
+    mini_portile2 (2.1.0)
+    minitest (5.9.0)
+    nokogiri (1.6.8)
+      mini_portile2 (~> 2.1.0)
+      pkg-config (~> 1.1.7)
+    parallel (1.9.0)
+    pkg-config (1.1.7)
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
-    rouge (1.10.1)
+    rouge (1.11.1)
     safe_yaml (1.0.4)
     sass (3.4.22)
     thread_safe (0.3.5)