add v1.31.0 release note

doc/release/v1.31.0.md

@@ -0,0 +1,23 @@
+## Fixes
+
+- Fixed and improved the trade sync.
+- Fixed MAX order history sync with the new order history api.
+
+## Features
+
+- Added more sync options for deposit history, withdraw history and reward history.
+- Added strategy controller for suspend, resume a strategy. thanks @andycheng123!
+- Added more indicators. thanks @zenixls2!
+
+## Strategy
+
+- Added autoborrow strategy (this is currently for binance only)
+- Added factorzoo strategy. thanks @austin362667!
+- Added elliott wave oscillator strategy. thhanks @zenixls2!
+
+## Internal
+
+- Upgraded rockhopper migration library for the new APIs.
+- Added mutex lock to the account object.
+- Refactored and rewrote the MAX API with requestgen.
+- Added grpc python client, thanks @narumiruna!