Regex definitions should be able to be made with a regex object.

[aykutkardas]

There should be three ways to use regex.

1. Using predefined regexes. ✅

"regex": "email",

2. Define as an object. ✅

"regex": { "pattern": "\\d+", "flags": "g" },

3. TODO: Define it as a regex object.

"regex": /\d+/g,

[aykutkardas]

Related commit: 15aafd5