Add release notes for v0.2.3
# Release Notes
+## Changes in Transact 0.2.3
+
+### Experimental Changes
+
+* Allow configuring "Write-Ahead Logging" (WAL) journal mode for SQLite
+ databases. This mode offers significant performance improvements over the
+ standard atomic commit and rollback mode.
+
+### Other Changes
+
+* Add `TryFrom` implementations to convert `TransactionResult` enums and
+ `TransactionReceipt` structs into `StateChange` structs.
+
## Changes in Transact 0.2.2
### Experimental Changes
