Added first proper CSS validation
Adjusting semantics of tests
Cleaning up test suite
Breaking out utils from test suite
Updated valid JSON assertion
Relocated Stylus tests
Fixing naming for test file
Broke out LESS, SASS, and SCSS into tests
Moved to common image setup
Rearranging utils to order used
Relocated CSS validation to util
Added CSS validation for Stylus
Asserting CSS validity for SASS
Adding validation to SASS and SCSS
Cleaning up tests
Added CSS validation to Stylus
Updated CHANGELOG
Release 4.2.1