Validate files with XO
https://github.com/xojs/gulp-xo/compare/v0.24.0...v0.25.0
https://github.com/xojs/gulp-xo/compare/v0.23.0...v0.24.0
https://github.com/xojs/gulp-xo/compare/v0.22.0...v0.23.0
Breaking:
gulp-eslint
https://github.com/xojs/gulp-xo/compare/v0.21.0...v0.22.0