prepareSkips: to resolve regexps in excludes

[mfederowicz]

related #1011

I know that we use https://github.com/mgechev/dots to process includePatterns and excludePatterns but I think there is better solution for that (https://github.com/bmatcuk/doublestar)

func Glob(fsys fs.FS, pattern string, opts ...GlobOption) ([]string, error) - return matching paths wehre pattern can be regexp or normal file path

my PR uses that function and converts regexp pattern to list of paths which next can be used to process packages in dots.ResolvePackages (of course if we set more then one includepath it will be processed individualy)

example:

./revive -exclude '**/linux*' -formatter friendly ./... vendor/...

[alexandear]

@chavacava, could you please review this when you have a moment? Thank you!