v1.2.6 24 Aug 2021
[New features]
* Support `crypto.Signer` keys for RSA, ECDSA, and EdDSA family
of signatures in `jws.Sign`
[Miscellaneous]
* `jwx.GuessFormat()` now requires the presense of both `payload` and
`signatures` keys for it to guess that a JSON object is a JWS message.
* Slightly enhance `jwt.Parse()` performance.