Hotfix/selector regexp fix

[samzlab]

Proposed changes

Replace simple regex test on "Tag" type selectors and using parent lookup for :nth-* pseudo selectors

Bumped semver to 1.4.2 (from 1.4.1)

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[Ffloriel]

Thanks a lot! Will take a look this week