Chrome/Safari don't fully support `font-style: oblique` angles

[ronikarjalainen]

Summary

This PR comes from this issue: https://github.com/mdn/browser-compat-data/issues/27050

I tried to add understandable explanation of the issue to the notes to.

Test results and supporting details

These are provided in the issue, but in short, it seems that Chrome (and Safari apparently) accept the angles supplied for font-style: oblique, but don't really properly use them. Certain degrees seem to fall back to font-style: italic while others seem to fall back to font-style: normal. Meanwhile, in stark contrast, Firefox supports the full degree range from -90 to 90.

Related issues

Fixes https://github.com/mdn/browser-compat-data/issues/27050, more or less.

[github-actions[bot]]

Tip: Review these changes grouped by change (recommended for most PRs), or grouped by feature (for large PRs).

[ronikarjalainen]

Oh, one thing I forgot to do was to squash the three commits into one. I hope that isn't an issue.