Simplify a regex

From #23 (comment)

Author: sindresorhus

index.js

@@ -130,7 +130,7 @@ exports.parse = function (str, opts) {
 		return ret;
 	}
 
-	str = str.trim().replace(/^(\?|#|&)/, '');
+	str = str.trim().replace(/^[?#&]/, '');
 
 	if (!str) {
 		return ret;