v5.1.0
- Revert CSON's use of CoffeeScript v2, as it [broke support for Node 4 and below](https://travis-ci.org/bevry/cson/builds/333130290) - Use of CoffeeScript v2 is now limited to compilation of this project only
- Revert CSON's use of CoffeeScript v2, as it [broke support for Node 4 and below](https://travis-ci.org/bevry/cson/builds/333130290) - Use of CoffeeScript v2 is now limited to compilation of this project only