Features
- add verbose key type error messages (df56b94)
Bug Fixes
- typescript: remove file extensions from .d.ts files (e091f0f), closes #222
- AES Key Wrap input type check (b83821b)
- guard SignJWT.prototype.sign() from missing protected header (4103719), closes #221
- typescript: add "jku" header to JoseHeaderParameters (#220) (72a72db)
