HORNET-2.0.0-alpha8

Changed

- Extracted Faucet into a new INX module. (#1451)
- Add own DbVersion for every database. (#1446)
- Add mnemonic parameter to ed25519 key tool. (#1450)
- Updated RocksDB to 7.1.2. (#1455)
- Updated Milestone payloads according to TIP-29. (#1456)
- Added new protocol parameters to info endpoint and INX. (#1456)

Fixed

- Adapt pruning and snapshotting to new milestone logic. (#1442)