Update browser gem to 2.2.0

Fixes https://github.com/fnando/browser/issues/241

Gemfile

@@ -48,7 +48,7 @@ gem 'attr_encrypted', '~> 3.0.0'
 gem 'u2f', '~> 0.2.1'
 
 # Browser detection
-gem "browser", '~> 2.0.3'
+gem "browser", '~> 2.2'
 
 # Extracting information from a git repository
 # Provide access to Gitlab::Git library

Gemfile.lock

@@ -98,7 +98,7 @@ GEM
       autoprefixer-rails (>= 5.2.1)
       sass (>= 3.3.4)
     brakeman (3.3.2)
-    browser (2.0.3)
+    browser (2.2.0)
     builder (3.2.2)
     bullet (5.0.0)
       activesupport (>= 3.0.0)
@@ -833,7 +833,7 @@ DEPENDENCIES
   binding_of_caller (~> 0.7.2)
   bootstrap-sass (~> 3.3.0)
   brakeman (~> 3.3.0)
-  browser (~> 2.0.3)
+  browser (~> 2.2)
   bullet
   bundler-audit
   byebug