Fix issue with cos & sin not stripping rad unit. #2284 Fix: handle empty at-rules #2416 Define function arguments explicitly #2417 Do not use the deprecated Buffer() constructor #2424 Fix issues #2411 Use mkdir() recursive option instead of mkdirp() Fix no such directory error in Stylus Executable #2421 Fixed define column for mixin #2456 Fix work with hash #2453 Extend in block level import #2270