Merge pull request #330 from xtext/dependabot/npm_and_yarn/vscode-extension-self-contained/vscode/test-electron-3.0.0

npm: bump @vscode/test-electron from 2.5.2 to 3.0.0 in /vscode-extension-self-contained

Author: cdietrich

vscode-extension-self-contained/package-lock.json

@@ -58,7 +58,7 @@
         "@types/node": "^20.19.43",
         "@types/vscode": "^1.103.0",
         "typescript": "^6.0.3",
-        "@vscode/test-electron": "^2.5.2",
+        "@vscode/test-electron": "^3.0.0",
         "@vscode/vsce": "^3.9.2",
         "esbuild": "^0.28.1"
     },