Add mutant

Author: ipepe

.mutant.yml

@@ -0,0 +1,2 @@
+---
+integration: rspec

Gemfile

@@ -1,4 +1,8 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
+gem 'mutant'
+gem 'mutant-rspec'
+gem 'mutant-license', source: 'https://oss:IG9NKHkepT1VE6CyvJiYH14GUsCHPtog@gem.mutant.dev'
+
 gemspec name: 'jsonapi_parameters'

bin/ci

@@ -4,3 +4,4 @@ set -e
 
 bundle exec bin/quality
 bundle exec bin/spec
+bundle exec bin/mutant

bin/mutant

@@ -0,0 +1,5 @@
+#!/usr/bin/env sh
+
+set -e
+
+bundle exec mutant