4.0.0

• Add support for France Connect + (https://github.com/france-connect/Documentation-FranceConnect-Plus/blob/main/fs/docs-fs.md), required for EIDAS level 2 & 3. (thanks to @CChemin for the help in implementing the decryption part, and @semangard and @remigauthierdocaposte for their help in troubleshooting the various errors)