Upgrade browser gem to 1.0.0 to avoid warning in IE11 compatibilty mode

Closes #2271

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.0.0 (unreleased)
+  - Upgrade browser gem to 1.0.0 to avoid warning in IE11 compatibilty mode (Stan Hu)
   - Remove user OAuth tokens from the database and request new tokens each session (Stan Hu)
   - Only show recent push event if the branch still exists or a recent merge request has not been created (Stan Hu)
   - Remove satellites

Gemfile

@@ -34,7 +34,7 @@ gem 'rqrcode-rails3'
 gem 'attr_encrypted', '1.3.4'
 
 # Browser detection
-gem "browser", '~> 0.8.0'
+gem "browser", '~> 1.0.0'
 
 # Extracting information from a git repository
 # Provide access to Gitlab::Git library

Gemfile.lock

@@ -76,7 +76,7 @@ GEM
       ruby_parser (~> 3.5.0)
       sass (~> 3.0)
       terminal-table (~> 1.4)
-    browser (0.8.0)
+    browser (1.0.0)
     builder (3.2.2)
     byebug (3.2.0)
       columnize (~> 0.8)
@@ -755,7 +755,7 @@ DEPENDENCIES
   binding_of_caller
   bootstrap-sass (~> 3.0)
   brakeman
-  browser (~> 0.8.0)
+  browser (~> 1.0.0)
   byebug
   cal-heatmap-rails (~> 0.0.1)
   capybara (~> 2.4.0)