[qa] Bump version to 23.0.0
Ahead of May 2021 network upgrade which includes, among others:
- Switch to using C++17
- Addition of double spend proof feature
- Multiple OP_RETURN standardness support within existing data carrier size
- Lifting of unconfirmed transaction chain length limit
- Removal of CPFP functionality
- Changes in mempool eviction order
- Minor RPC additions and changes
- New ZMQ functionality (related to dsproof)
- Minor changes in error codes
- Changes to graphical user interface
- Extension of software expiry timeframe
Test plan:
- review, do a
ninja allbuild