* Waku: Clarify what to do with unknown option keys
* Change options key ignoring to SHOULD and add to changelog
* Update Nimbus supported spec version
- Simplify implementation matrix with latest state
- Introduces a new required packet code Status Code (`0x22`) for communicating option changes
- Deprecates the following packet codes: PoW Requirement (`0x02`), Bloom Filter (`0x03`), Rate limits (`0x20`), Topic interest (`0x21`) - all superseded by the new Status Code (`0x22`)
- Increased `topic-interest` capacity from 1000 to 10000