fix: Gemfile & Gemfile.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-569599
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-569600
- https://snyk.io/vuln/SNYK-RUBY-ACTIONVIEW-569601
- https://snyk.io/vuln/SNYK-RUBY-ACTIVESUPPORT-569598

Author: snyk-bot

Gemfile

@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'addressable'
-gem 'allowy'
+gem 'allowy', '>= 2.1.0'
 gem 'cf-copilot', '0.0.14'
 gem 'clockwork', require: false
 gem 'cloudfront-signer'
@@ -41,14 +41,14 @@ gem 'vmstat', '~> 2.0'
 gem 'yajl-ruby'
 
 # Rails Components
-gem 'actionpack', '~> 5.2.4', '>= 5.2.4.2'
-gem 'actionview', '~> 5.2.4', '>= 5.2.4.2'
-gem 'activemodel', '~> 5.2.0'
-gem 'railties', '~> 5.2.4', '>= 5.2.4.2'
+gem 'actionpack', '~> 5.2.4', '>= 5.2.4.3'
+gem 'actionview', '~> 5.2.4', '>= 5.2.4.3'
+gem 'activemodel', '~> 5.2.4', '>= 5.2.4.3'
+gem 'railties', '~> 5.2.4', '>= 5.2.4.3'
 
 # Blobstore and Bits Service Dependencies
 gem 'azure-storage', '0.14.0.preview' # https://github.com/Azure/azure-storage-ruby/issues/122
-gem 'bits_service_client', '~> 3.0'
+gem 'bits_service_client', '~> 3.3', '>= 3.3.0'
 gem 'fog-aliyun'
 gem 'fog-aws'
 gem 'fog-azure-rm', git: 'https://github.com/fog/fog-azure-rm.git', branch: 'fog-arm-cf'
@@ -84,7 +84,7 @@ group :test do
   gem 'rspec-its'
   gem 'rspec-rails', '~> 3.8.3'
   gem 'rspec-wait'
-  gem 'rspec_api_documentation', '>= 4.8.0'
+  gem 'rspec_api_documentation', '>= 6.1.0'
   gem 'rubocop', '~> 0.79.0'
   gem 'timecop'
   gem 'webmock', '> 2.3.1'