Upgrate to 2.0. Inlcudes 6 additions:
- Upgrade to Cedar 3.1.0. #71
- Upgrade to Cedar dependencies to 3.0.0. This is a breaking change requiring the 2.0 release. #59
- Added derive Clone to RefreshRate struct. #62
- Allow clippy::blocks_in_conditions lint. #65
- Partial evaluation. #64
- More detailed provider parsing error messages. #68
