matchers.go
func NewMethod(m []string) Method {
	for k, v := range m {
		m[k] = strings.ToUpper(v)
	}
	return Method(m)
}
func NewMethod(m []string) Method {
	for k, v := range m {
		m[k] = strings.ToUpper(v)
	}
	return Method(m)
}
// Method ---------------------------------------------------------------------
// NewMethod retuns a request method matcher, converting values to upper-case.