Set vscode engine to have the proposed API

Author: karthiknadig

package.json

@@ -46,7 +46,7 @@
         "theme": "dark"
     },
     "engines": {
-        "vscode": "^1.86.0"
+        "vscode": "^1.89.0-20240415"
     },
     "enableTelemetry": false,
     "keywords": [