Bump jquery-rails gem version

Gemfile

@@ -193,7 +193,7 @@ gem 'font-awesome-rails', '~> 4.2'
 gem 'gitlab_emoji',       '~> 0.1'
 gem 'gon',                '~> 5.0.0'
 gem 'jquery-atwho-rails', '~> 1.0.0'
-gem 'jquery-rails',       '3.1.2'
+gem 'jquery-rails',       '3.1.3'
 gem 'jquery-scrollto-rails'
 gem 'jquery-ui-rails'
 gem 'nprogress-rails'

Gemfile.lock

@@ -331,7 +331,7 @@ GEM
     inflecto (0.0.2)
     ipaddress (0.8.0)
     jquery-atwho-rails (1.0.1)
-    jquery-rails (3.1.2)
+    jquery-rails (3.1.3)
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)
     jquery-scrollto-rails (1.4.3)
@@ -777,7 +777,7 @@ DEPENDENCIES
   html-pipeline (~> 1.11.0)
   httparty
   jquery-atwho-rails (~> 1.0.0)
-  jquery-rails (= 3.1.2)
+  jquery-rails (= 3.1.3)
   jquery-scrollto-rails
   jquery-turbolinks
   jquery-ui-rails