v0.6.0

Changed

• Use base64ct instead of base64 for base64 encoding/decoding.

• Update dependency to rsa 0.7 and use rsa::pkcs1v15::{SigningKey, VerifyingKey} directly.

  Removed wrappers for RSA keys and implement Signer and Verifier directly with the keys.

  Requires sha2 crate with oid feature and signature crate.

  See updated tests for examples.