v0.2.1-alpha dev preview of revoke

Combines new features to help with development:

• revoking commitments
• limiting vesting amount in claimAndVest

ERC2771

What's Changed

• Bump solidity version to 0.8.17 by @malteish in #2
• Add openzeppelin by @malteish in #3
• Introduce erc2771 by @malteish in #4
• Add tests for erc2771 by @malteish in #5
• Extend documentation by @malteish in #6
• Set restricted by default by @malteish in #7

New Contributors

• @malteish made their first contribution in #2

Full Changelog: https://github.com/corpus-io/dss-vest/commits/v1.2.0