Update json requirement from = 2.1.0 to 2.2.0

Updates the requirements on [json](https://github.com/flori/json) to permit the latest version.
- [Release notes](https://github.com/flori/json/releases)
- [Changelog](https://github.com/flori/json/blob/master/CHANGES.md)
- [Commits](ruby/json@v2.1.0...v2.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

Gemfile

@@ -17,9 +17,9 @@ ruby_version_segments = Gem::Version.new(RUBY_VERSION.dup).segments
 minor_version = ruby_version_segments[0..1].join('.')
 
 group :development do
-  gem "json", '= 2.0.4',                                         require: false if Gem::Requirement.create('~> 2.4.2').satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.1.0',                                         require: false if Gem::Requirement.create(['>= 2.5.0', '< 2.7.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.3.0',                                         require: false if Gem::Requirement.create(['>= 2.7.0', '< 2.8.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '2.2.0',                                         require: false if Gem::Requirement.create('~> 2.4.2').satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '2.2.0',                                         require: false if Gem::Requirement.create(['>= 2.5.0', '< 2.7.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '2.2.0',                                         require: false if Gem::Requirement.create(['>= 2.7.0', '< 2.8.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
   gem "puppet-module-posix-default-r#{minor_version}", '~> 1.0', require: false, platforms: [:ruby]
   gem "puppet-module-posix-dev-r#{minor_version}", '~> 1.0',     require: false, platforms: [:ruby]
   gem "puppet-module-win-default-r#{minor_version}", '~> 1.0',   require: false, platforms: [:mswin, :mingw, :x64_mingw]