Bump capybara from 3.20.2 to 3.21.0 (#10854)

Bumps [capybara](https://github.com/teamcapybara/capybara) from 3.20.2 to 3.21.0.
- [Release notes](https://github.com/teamcapybara/capybara/releases)
- [Changelog](https://github.com/teamcapybara/capybara/blob/master/History.md)
- [Commits](https://github.com/teamcapybara/capybara/compare/3.20.2...3.21.0)

Gemfile

@@ -108,7 +108,7 @@ group :production, :test do
 end
 
 group :test do
-  gem 'capybara', '~> 3.20'
+  gem 'capybara', '~> 3.21'
   gem 'climate_control', '~> 0.2'
   gem 'faker', '~> 1.9'
   gem 'microformats', '~> 4.1'

Gemfile.lock

@@ -129,13 +129,13 @@ GEM
       sshkit (~> 1.3)
     capistrano-yarn (2.0.2)
       capistrano (~> 3.0)
-    capybara (3.20.2)
+    capybara (3.21.0)
       addressable
       mini_mime (>= 0.1.3)
       nokogiri (~> 1.8)
       rack (>= 1.6.0)
       rack-test (>= 0.6.3)
-      regexp_parser (~> 1.2)
+      regexp_parser (~> 1.5)
       xpath (~> 3.2)
     case_transform (0.2)
       activesupport
@@ -497,7 +497,7 @@ GEM
       redis-store (>= 1.2, < 2)
     redis-store (1.5.0)
       redis (>= 2.2, < 5)
-    regexp_parser (1.5.0)
+    regexp_parser (1.5.1)
     request_store (1.4.1)
       rack (>= 1.4)
     responders (2.4.1)
@@ -668,7 +668,7 @@ DEPENDENCIES
   capistrano-rails (~> 1.4)
   capistrano-rbenv (~> 2.1)
   capistrano-yarn (~> 2.0)
-  capybara (~> 3.20)
+  capybara (~> 3.21)
   charlock_holmes (~> 0.7.6)
   chewy (~> 5.0)
   cld3 (~> 3.2.4)