Add release notes for v0.2.2
# Release Notes
+## Changes in Transact 0.2.2
+
+### Experimental Changes
+
+* Update the `SmartContractArchive::from_scar_file` constructor to take multiple
+ search paths for .scar files.
+* Add a configurable prefix for table names in SQLite databases.
+* Enable reading state via the cursor when using the SQLite database writer.
+
## Changes in Transact 0.2.1:
### Highlights:
