Parsing fails for font imports with multiple weights due to CSSOM parser issue

[RahulLanjewar93]

CSSOM doesn't expect ; inside import statements.
However while importing fonts we can have multiple weights, where in we will have to use the ;.

In this case, the parsing fails.
Have attached the issue link below. The workaround is also mentioned in the thread for whoever is facing this issue.
NV/CSSOM#116

[RahulLanjewar93]

@jonkemp @kylemac if there's a known issue section, maybe we can add this there.