Drop contracts-rspec, bring in our ruby3 version

Author: rick

Gemfile.lock

@@ -23,7 +23,6 @@ GEM
     ast (2.4.2)
     concurrent-ruby (1.1.9)
     contracts (0.16.0)
-    contracts-rspec (0.1.0)
     crack (0.4.5)
       rexml
     diff-lcs (1.5.0)
@@ -120,7 +119,6 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  contracts-rspec (= 0.1.0)
   entitlements (= 0.2.0.g8e5e05d)
   entitlements-github-plugin!
   rake (= 13.0.6)

entitlements-github-plugin.gemspec

@@ -20,7 +20,6 @@ Gem::Specification.new do |s|
   s.add_dependency "octokit", "~> 4.18"
   s.add_dependency "optimist", "= 3.0.0"
 
-  s.add_development_dependency "contracts-rspec", "= 0.1.0"
   s.add_development_dependency "entitlements", "0.2.0.g8e5e05d"
   s.add_development_dependency "rake", "= 13.0.6"
   s.add_development_dependency "rspec", "= 3.8.0"

spec/unit/spec_helper.rb

@@ -153,6 +153,19 @@ module MyLetDeclarations
   let(:logger) { Entitlements.dummy_logger }
 end
 
+module Contracts
+  module RSpec
+    module Mocks
+      def instance_double(klass, *args)
+        super.tap do |double|
+          allow(double).to receive(:is_a?).with(klass).and_return(true)
+          allow(double).to receive(:is_a?).with(ParamContractError).and_return(false)
+        end
+      end
+    end
+  end
+end
+
 RSpec.configure do |config|
   config.include Contracts::RSpec::Mocks
   config.include MyLetDeclarations