Use 're2' package to prevent ReDoS?

According to the [Ajv documentation](https://github.com/ajv-validator/ajv/blob/bd8d86579386cb58854e9db74a5dc7b2d1894806/docs/security.md#redos-attack):

> some formats that ajv-formats package implements use regular expressions that can be vulnerable to ReDoS attack

Having you considered using the [`re2`](https://www.npmjs.com/package/re2) package to eliminate this risk? According to its [documentation](https://github.com/google/re2/wiki/WhyRE2):

> RE2 was designed and implemented with an explicit goal of being able to handle regular expressions from untrusted users without risk. One of its primary guarantees is that the match time is linear in the length of the input string.