[Expanding] Support all level 4 tests
[Expanding] Support all level 4 tests

kylef/URITemplate.swift,RuiAAPeres/URITemplate.swift,kylef/URITemplate.swift,mogstad/URITemplate.swift,mogstad/URITemplate.swift,RuiAAPeres/URITemplate.swift,RuiAAPeres/URITemplate.swift