Fix v3.public

The previous iteration tolerated high values for S.

A stricter ECDSA library will fail to validate these. Only low-S signatures should be accepted.

We are not going to add this as an expected-fail test vector, because some developers may not have control over how strict their ECDSA library is.

Fix k3.seal tests

See paragonie/paserk-php#12

Version 1.1.0

Merge pull request #21 from paseto-standard/paserk-expect-fail

Paserk expect fail