0.0.6: * Updates minimum supported SDK version to Flutter 3.16/Dart 3.2.

* upgrade pointycastle to 3.9.1
* remove unnecessary ! operator from some files

0.0.5

Full Changelog: 0.0.3...0.0.5

0.0.3

* Supports sign and verify for RSA.* Supports sign and verify for RSA.

0.0.2: * Generate RSA KeyPairs and import to pem format.

* Supports AES. CBC、CFB-8、CFB-128、ECB、OFB-128、CTR.