Bump version

Author: KartoffelToby

custom_components/better_thermostat/manifest.json

@@ -17,5 +17,5 @@
   "iot_class": "local_push",
   "issue_tracker": "https://github.com/KartoffelToby/better_thermostat/issues",
   "requirements": [],
-  "version": "1.8.0-dev"
-}
+  "version": "1.8.0-Beta-8"
+}