Minimum key length of 2048 bits?

[rolodato]

According to section 8.2 of the JWT spec, key lengths of 2048 or greater must be used when signing a token with RSA256.

However, it seems that we're generating keys of only 1024 bits as shown here: https://github.com/auth0/TouchIDAuth/blob/a6f9659c63deeb21faad05acacc48323c00ac77e/Pod/Classes/A0TouchIDAuthentication.m#L105.