CHANGELOG.md in duckdb-0.2.9.0 vs CHANGELOG.md in duckdb-0.3.1.0

@@ -1,6 +1,13 @@
 # ChangeLog
 
+# 0.3.1.0
+
+- bump duckdb to 0.3.1 in CI.
+- bump duckdb to 0.3.0 in CI.
+- append_time, append_date, append_timestamp of DuckDB::Appender accept argument
+  having to_str to convert time string.
+
 # 0.2.9.0
 
 - add DuckDB::Appender#append
   - breaking change.
     - append_timestamp is called when the argument is Time object.