update CONTRIBUTING.md; closes issue/3624
update CONTRIBUTING.md; closes issue/3624

Signed-off-by: Christopher Hiller <cba4593484830aa757cb097d8d9f0ea9b692b304@boneskull.com>

outsideris/mocha,adamgruber/mocha,igwejk/mocha,outsideris/mocha,mochajs/mocha,adamgruber/mocha,adamgruber/mocha,mochajs/mocha,mochajs/mocha,igwejk/mocha