Notable changes
- Fixed bug in validating castle moves
- Fixed bug in validating king safety for en-passant captures
- Fixed bug in piece-square tables setup: tables now mirror correctly for each side to move.
- In CLI mode, user now prevented from executing a search without first specifying a position. This would previously result in an un-handled panic.
- Singular extensions no longer used in search. This may be added back in a future release.