add changelog rake task

Gemfile

@@ -5,6 +5,7 @@ source "https://rubygems.org"
 # Specify your gem's dependencies in foreman_envsync.gemspec
 gemspec
 
+gem "github_changelog_generator"
 gem "rake", "~> 13.0"
 gem "rspec", "~> 3.0"
 gem "rubocop", "~> 1.7"

Rakefile

@@ -1,12 +1,20 @@
 # frozen_string_literal: true
 
 require "bundler/gem_tasks"
+require "github_changelog_generator/task"
 require "rspec/core/rake_task"
+require "rubocop/rake_task"
+require "foreman_envsync"
 
 RSpec::Core::RakeTask.new(:spec)
 
-require "rubocop/rake_task"
-
 RuboCop::RakeTask.new
 
+GitHubChangelogGenerator::RakeTask.new :changelog do |config|
+  config.future_release = ForemanEnvsync::VERSION
+  config.exclude_labels = ["skip-changelog"]
+  config.user = "lsst-it"
+  config.project = "foreman_envsync"
+end
+
 task default: %i[spec rubocop]