Path-to-RegExp
Turn a path string such as `/user/:name` into a regular expression
... an unnamed parameter that only consists of a regexp. It works the same the named parameter, except it will be numerically indexed. When dealing with query strings, escape the question mark (?) so it doesn't mark the parameter as optional. Handling unordered data is outside the scope of this library. Parameters can be suffixed with an asterisk (*) to denote a zero or more parameter matches.