Update SafariConverterLib to v4: improved regexes, improved advanced rules

[ameshkov]

There's a new major update in SafariConverterLib, version v4.0.0:
https://github.com/AdguardTeam/SafariConverterLib/blob/v4.0.0/CHANGELOG.md

Important changes

1. url-filter conversion has been changed, it should greatly improve the time required for Safari to load content blocking rules.
2. Web Extension now uses browser.scripting.executeScript API to apply JS and scriptlet rules. It solves quite a few filtering issues.
3. There's a bunch of other improvements, see the full changelog.