update: use apparition - the successor of poltergeist

In the long run we probably want to migrate to selenium
as it looks like apparition is also not maintained anymore.

Gemfile

@@ -220,13 +220,8 @@ group :test, :ci do
 
   gem 'capybara', require: false
 
-  # Capybara driver with javascript capabilities using phantomjs
-  # locked to major version for stable API
-  gem 'poltergeist', '~> 1.5', require: false
-
-  # Headless webkit browser for testing, fast and with javascript
-  # Version newer than 1.8 is required by current poltergeist.
-  gem 'phantomjs-binaries', '~> 2.1.1', require: false
+  # Capybara driver with javascript capabilities using chromes CDP
+  gem 'apparition', github: 'twalpole/apparition', ref: 'ca86be4d54af835d531dbcd2b86e7b2c77f85f34'
 
   # The castle_gates tests are based on sqlite
   gem 'sqlite3'

Gemfile.lock

@@ -1,3 +1,12 @@
+GIT
+  remote: https://github.com/twalpole/apparition.git
+  revision: ca86be4d54af835d531dbcd2b86e7b2c77f85f34
+  ref: ca86be4d54af835d531dbcd2b86e7b2c77f85f34
+  specs:
+    apparition (0.6.0)
+      capybara (~> 3.13, < 4)
+      websocket-driver (>= 0.6.5)
+
 GIT
   remote: https://github.com/voxmedia/prototype-rails.git
   revision: 740f70179a7c2a1d8619518294f75cd3755a8f68
@@ -107,7 +116,6 @@ GEM
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
     chronic (0.10.2)
-    cliver (0.3.2)
     concurrent-ruby (1.2.2)
     crabgrass_media (0.5.0)
       activesupport (~> 6.0)
@@ -190,12 +198,6 @@ GEM
     nio4r (2.5.8)
     nokogiri (1.14.2-x86_64-linux)
       racc (~> 1.4)
-    phantomjs-binaries (2.1.1.1)
-      sys-uname (= 0.9.0)
-    poltergeist (1.18.1)
-      capybara (>= 2.1, < 4)
-      cliver (~> 0.3.1)
-      websocket-driver (>= 0.2.0)
     public_suffix (5.0.1)
     pundit (2.3.0)
       activesupport (>= 3.0.0)
@@ -266,8 +268,6 @@ GEM
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
     sqlite3 (1.6.2-x86_64-linux)
-    sys-uname (0.9.0)
-      ffi (>= 1.0.0)
     temple (0.10.0)
     thinking-sphinx (5.5.1)
       activerecord (>= 4.2.0)
@@ -318,6 +318,7 @@ DEPENDENCIES
   acts-as-taggable-on (~> 8.1)
   acts_as_list (~> 1.0)
   after_commit_everywhere (~> 1.1)
+  apparition!
   bcrypt (~> 3.1.7)
   bootsnap (~> 1.9)
   bundler-audit
@@ -341,8 +342,6 @@ DEPENDENCIES
   minitest (~> 5.10)
   mysql2 (~> 0.5)
   nokogiri (~> 1.12)
-  phantomjs-binaries (~> 2.1.1)
-  poltergeist (~> 1.5)
   prototype-rails!
   pundit (~> 2.1)
   rails (~> 6.1.4)

test/javascript_integration_test.rb

@@ -1,5 +1,5 @@
 require 'integration_test'
-require 'capybara/poltergeist'
+require 'capybara/apparition'
 
 # require all javascript integration helpers
 Dir[File.dirname(__FILE__) + '/helpers/integration/javascript/*.rb'].each do |file|
@@ -11,7 +11,7 @@ class JavascriptIntegrationTest < IntegrationTest
   include AjaxPending
   include Autocomplete
 
-  Capybara.javascript_driver = :poltergeist
+  Capybara.javascript_driver = :apparition
   self.use_transactional_tests = false
 
   def setup