Bump oauth2

Gemfile.lock

@@ -421,7 +421,7 @@ GEM
     json (1.8.3)
     json-schema (2.6.0)
       addressable (~> 2.3.8)
-    jwt (1.5.2)
+    jwt (1.5.1)
     kaminari (0.16.3)
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
@@ -468,12 +468,12 @@ GEM
       nenv (~> 0.1)
       shellany (~> 0.0)
     oauth (0.4.7)
-    oauth2 (1.0.0)
+    oauth2 (1.1.0)
       faraday (>= 0.8, < 0.10)
-      jwt (~> 1.0)
+      jwt (~> 1.0, < 1.5.2)
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
-      rack (~> 1.2)
+      rack (>= 1.2, < 3)
     omniauth (1.3.1)
       hashie (>= 1.2, < 4)
       rack (>= 1.0, < 3)