chore(version): bump version to 1.8.1

Hotfix to v1.8.0

Author: realth000

pubspec.yaml

@@ -5,7 +5,7 @@ homepage: https://github.com/realth000/tsdm_client
 issue_tracker: https://github.com/realth000/tsdm_client/issues
 publish_to: "none"
 
-version: 1.8.0+47
+version: 1.8.1+48
 
 environment:
   flutter: ">=3.32.0 <4.0.0"