Fix version matching for sass compiled with dart2js

[lelgenio]

sass may report the version differently if it's the nodejs version of dart-sass:

$ sass --version
1.62.1 compiled with dart2js 2.19.6

I would expect the version to be 1.62.1, but currently trunk thinks it's 1.62.1 compiled with dart2js 2.19.6.

Checklist

• Updated CHANGELOG.md describing pertinent changes.
• Updated README.md with pertinent info (may not always apply).
• Updated site content with pertinent info (may not always apply).
• Squash down commits to one or two logical commits which clearly describe the work you've done. If you don't, then Dodd will 🤓.

Fixes: #541