Update gems.

Gemfile.lock

@@ -183,7 +183,7 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (~> 1.2)
-    oj (2.14.3)
+    oj (2.17.5)
     omniauth (1.3.1)
       hashie (>= 1.2, < 4)
       rack (>= 1.0, < 3)
@@ -221,7 +221,7 @@ GEM
     openid-redis-store (0.0.2)
       redis
       ruby-openid
-    pg (0.18.4)
+    pg (0.19.0)
     progress (3.1.1)
     pry (0.10.4)
       coderay (~> 1.1.0)
@@ -270,7 +270,7 @@ GEM
       activesupport (= 4.2.7.1)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    raindrops (0.16.0)
+    raindrops (0.17.0)
     rake (11.2.2)
     rake-compiler (0.9.9)
       rake
@@ -281,7 +281,7 @@ GEM
       ffi (>= 1.0.6)
       msgpack (>= 0.4.3)
       trollop (>= 1.16.2)
-    redis (3.3.0)
+    redis (3.3.1)
     redis-namespace (1.5.2)
       redis (~> 3.0, >= 3.0.4)
     rest-client (1.8.0)
@@ -342,9 +342,10 @@ GEM
     shoulda-context (1.2.1)
     shoulda-matchers (2.8.0)
       activesupport (>= 3.0.0)
-    sidekiq (4.1.2)
+    sidekiq (4.2.4)
       concurrent-ruby (~> 1.0)
       connection_pool (~> 2.2, >= 2.2.0)
+      rack-protection (>= 1.5.0)
       redis (~> 3.2, >= 3.2.1)
     sidekiq-statistic (1.2.0)
       sidekiq (>= 3.3.4, < 5)
@@ -388,7 +389,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.1)
-    unicorn (5.1.0)
+    unicorn (5.2.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     uniform_notifier (1.10.0)