Rakefile: changelog task: ensure correct line endings

Rakefile

@@ -60,6 +60,18 @@ else
     gem_version = Gem::Specification.load("#{config.project}.gemspec").version
     config.future_release = gem_version
   end
+
+  # Workaround for https://github.com/github-changelog-generator/github-changelog-generator/issues/715
+  require 'rbconfig'
+  if RbConfig::CONFIG['host_os'].include?('linux')
+    task :changelog do
+      puts 'Fixing line endings...'
+      changelog_file = File.join(__dir__, 'CHANGELOG.md')
+      changelog_txt = File.read(changelog_file)
+      new_contents = changelog_txt.gsub("\r\n", "\n")
+      File.open(changelog_file, 'w') { |file| file.puts new_contents }
+    end
+  end
 end
 
 begin