v0.4.0

• Uses EmulatedRegExp (unless avoidSubclass is enabled) for patterns with atomic groups or possessive quantifiers.
• EmulatedRegExp automatically adjusts subpattern matches and indices to account for injected emulation groups.
• Added target option 'auto' (hat-tip @antfu for idea).
• Improved \G support so it works with additional patterns.
• Changed the shape of toDetails results when subclass details are included.
• Renamed the types used for options objects.
• Added missing Unicode case folding for Latin small long s ſ U+017F.