(maint) - Add deep_merge gem dependency

lib/rspec-puppet-facts.rb

@@ -2,6 +2,7 @@
 require 'facter'
 require 'facterdb'
 require 'json'
+require 'deep_merge'
 
 # The purpose of this module is to simplify the Puppet
 # module's RSpec tests by looping through all supported
@@ -411,11 +412,3 @@ def self.facter_version_for_puppet_version(puppet_version)
     :default => RspecPuppetFacts.facter_version_for_puppet_version(Puppet.version)
   c.add_setting :facterdb_string_keys, :default => false
 end
-
-# monkey patch the Hash Class to add deep_merge
-class ::Hash
-  def deep_merge(second)
-    merger = proc { |_, v1, v2| Hash === v1 && Hash === v2 ? v1.merge(v2, &merger) : Array === v1 && Array === v2 ? v1 | v2 : [:undefined, nil, :nil].include?(v2) ? v1 : v2 }
-    merge(second.to_h, &merger)
-  end
-end

rspec-puppet-facts.gemspec

@@ -25,6 +25,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'voxpupuli-rubocop', '~> 2.0'
 
+  s.add_runtime_dependency 'deep_merge', '~> 1.2'
   s.add_runtime_dependency 'facter'
   s.add_runtime_dependency 'facterdb', '>= 0.5.0'
   s.add_runtime_dependency 'puppet'