0fr is erroneously compressed to 0

[jazzzz]

Input:

*
  grid-template-columns 0fr 1fr

Compiling this file with Stylus 0.54.8 with the --compress option gives:

*{grid-template-columns:0 1fr}

The expected output is:

*{grid-template-columns:0fr 1fr}

[tborychowski]

The same is with deg, where 0deg gets compressed to 0, which does not work (e.g. in firefox).

[iChenLei]

Will fix at next version

These code wrote at 8 years ago by tj, it'd outdated for a long time