<Updated loofah gem> (#314)

Gemfile.lock

@@ -118,7 +118,7 @@ GEM
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    loofah (2.2.2)
+    loofah (2.2.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.0)
@@ -136,7 +136,7 @@ GEM
     net-ldap (0.16.1)
     netrc (0.11.0)
     nio4r (2.3.1)
-    nokogiri (1.8.3)
+    nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
     oauth (0.5.4)
     oauth2 (1.4.0)