Update GitLab QA dependencies

qa/Gemfile

 source 'https://rubygems.org'
 
-gem 'pry-byebug', '~> 3.4.1', platform: :mri
-gem 'capybara', '~> 2.12.1'
-gem 'capybara-screenshot', '~> 1.0.14'
-gem 'rake', '~> 12.0.0'
-gem 'rspec', '~> 3.5'
-gem 'selenium-webdriver', '~> 2.53'
+gem 'pry-byebug', '~> 3.5.1', platform: :mri
+gem 'capybara', '~> 2.16.1'
+gem 'capybara-screenshot', '~> 1.0.18'
+gem 'rake', '~> 12.3.0'
+gem 'rspec', '~> 3.7'
+gem 'selenium-webdriver', '~> 3.8.0'

qa/Gemfile.lock

 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.0)
-      public_suffix (~> 2.0, >= 2.0.2)
-    byebug (9.0.6)
-    capybara (2.12.1)
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
+    byebug (9.1.0)
+    capybara (2.16.1)
       addressable
-      mime-types (>= 1.16)
+      mini_mime (>= 0.1.3)
       nokogiri (>= 1.3.3)
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
-    capybara-screenshot (1.0.14)
+    capybara-screenshot (1.0.18)
       capybara (>= 1.0, < 3)
       launchy
-    childprocess (0.7.0)
+    childprocess (0.8.0)
       ffi (~> 1.0, >= 1.0.11)
-    coderay (1.1.1)
+    coderay (1.1.2)
     diff-lcs (1.3)
     ffi (1.9.18)
     launchy (2.4.3)
       addressable (~> 2.3)
-    method_source (0.8.2)
-    mime-types (3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
+    method_source (0.9.0)
+    mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     nokogiri (1.8.1)
       mini_portile2 (~> 2.3.0)
-    pry (0.10.4)
+    pry (0.11.3)
       coderay (~> 1.1.0)
-      method_source (~> 0.8.1)
-      slop (~> 3.4)
-    pry-byebug (3.4.2)
-      byebug (~> 9.0)
+      method_source (~> 0.9.0)
+    pry-byebug (3.5.1)
+      byebug (~> 9.1)
       pry (~> 0.10)
-    public_suffix (2.0.5)
-    rack (2.0.1)
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    rake (12.0.0)
-    rspec (3.5.0)
-      rspec-core (~> 3.5.0)
-      rspec-expectations (~> 3.5.0)
-      rspec-mocks (~> 3.5.0)
-    rspec-core (3.5.4)
-      rspec-support (~> 3.5.0)
-    rspec-expectations (3.5.0)
+    public_suffix (3.0.1)
+    rack (2.0.3)
+    rack-test (0.8.2)
+      rack (>= 1.0, < 3)
+    rake (12.3.0)
+    rspec (3.7.0)
+      rspec-core (~> 3.7.0)
+      rspec-expectations (~> 3.7.0)
+      rspec-mocks (~> 3.7.0)
+    rspec-core (3.7.0)
+      rspec-support (~> 3.7.0)
+    rspec-expectations (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-mocks (3.5.0)
+      rspec-support (~> 3.7.0)
+    rspec-mocks (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-support (3.5.0)
+      rspec-support (~> 3.7.0)
+    rspec-support (3.7.0)
     rubyzip (1.2.1)
-    selenium-webdriver (2.53.4)
+    selenium-webdriver (3.8.0)
       childprocess (~> 0.5)
       rubyzip (~> 1.0)
-      websocket (~> 1.0)
-    slop (3.6.0)
-    websocket (1.2.4)
-    xpath (2.0.0)
+    xpath (2.1.0)
       nokogiri (~> 1.3)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  capybara (~> 2.12.1)
-  capybara-screenshot (~> 1.0.14)
-  pry-byebug (~> 3.4.1)
-  rake (~> 12.0.0)
-  rspec (~> 3.5)
-  selenium-webdriver (~> 2.53)
+  capybara (~> 2.16.1)
+  capybara-screenshot (~> 1.0.18)
+  pry-byebug (~> 3.5.1)
+  rake (~> 12.3.0)
+  rspec (~> 3.7)
+  selenium-webdriver (~> 3.8.0)
 
 BUNDLED WITH
-   1.15.4
+   1.16.0