bump omniauth

Gemfile

@@ -135,7 +135,7 @@ gem "open_graph_reader", "0.6.1"
 
 # Services
 
-gem "omniauth",           "1.2.2"
+gem "omniauth",           "1.3.1"
 gem "omniauth-facebook",  "3.0.0"
 gem "omniauth-tumblr",    "1.2"
 gem "omniauth-twitter",   "1.2.1"

Gemfile.lock

@@ -114,7 +114,6 @@ GEM
       compass (~> 1.0.0)
       sass-rails (< 5.1)
       sprockets (< 2.13)
-    concurrent-ruby (1.0.0)
     configurate (0.3.1)
     connection_pool (2.2.0)
     crack (0.4.3)
@@ -471,9 +470,9 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (~> 1.2)
-    omniauth (1.2.2)
+    omniauth (1.3.1)
       hashie (>= 1.2, < 4)
-      rack (~> 1.0)
+      rack (>= 1.0, < 3)
     omniauth-facebook (3.0.0)
       omniauth-oauth2 (~> 1.2)
     omniauth-oauth (1.1.0)
@@ -832,7 +831,7 @@ DEPENDENCIES
   mobile-fu (= 1.3.1)
   mysql2 (= 0.3.20)
   nokogiri (= 1.6.7.1)
-  omniauth (= 1.2.2)
+  omniauth (= 1.3.1)
   omniauth-facebook (= 3.0.0)
   omniauth-tumblr (= 1.2)
   omniauth-twitter (= 1.2.1)