feat: update version to 2.1.1 and enhance property normalization in ExpiryIndicator functionality

config/package-solution.json

@@ -3,7 +3,7 @@
   "solution": {
     "name": "expiry-indicator-client-side-solution",
     "id": "68bb6d2d-9895-45b4-88e8-b98835faa981",
-    "version": "2.1.0.0",
+    "version": "2.1.1.0",
     "includeClientSideAssets": true,
     "skipFeatureDeployment": false,
     "features": [
@@ -11,7 +11,7 @@
         "title": "ExpiryIndicator extension registration",
         "description": "Registers ExpiryIndicator commands and its settings Application Customizer. Does not provision ExpiryDate.",
         "id": "913402af-ab9a-4974-9f86-5c2159ae41db",
-        "version": "2.1.0.0",
+        "version": "2.1.1.0",
         "assets": {
           "elementManifests": [
             "elements.xml",