Improving tests quality and coverage for dom module - III
Improving tests quality and coverage for dom module - III

- Added tests for p5.Element.prototype.addClass
- Added tests for p5.Element.prototype.removeClass
- Added tests for p5.Element.prototype.hasClass
- Added tests for p5.Element.prototype.toggleClass
- Added tests for p5.Element.prototype.child
- Added tests for p5.Element.prototype.center // Need help
- Added tests for p5.Element.prototype.html

processing/p5.js,limzykenneth/p5.js,limzykenneth/p5.js,processing/p5.js,dhowe/p5.js,dhowe/p5.js,mlarghydracept/p5.js,mlarghydracept/p5.js