Bump version

Should have done this at the start of the development cycle...

custom_components/tuya_local/manifest.json

@@ -2,7 +2,7 @@
     "domain": "tuya_local",
     "iot_class": "local_polling",
     "name": "Tuya Local",
-    "version": "0.20.2",
+    "version": "0.20.3",
     "documentation": "https://github.com/make-all/tuya-local",
     "issue_tracker": "https://github.com/make-all/tuya-local/issues",
     "dependencies": [],