Set up deprecation plugin

Author: norascheuch

extensions/ql-vscode/.eslintrc.js

@@ -28,6 +28,7 @@ const baseConfig = {
     "plugin:@typescript-eslint/recommended",
     "plugin:import/recommended",
     "plugin:import/typescript",
+    "plugin:deprecation/recommended",
   ],
   rules: {
     "@typescript-eslint/await-thenable": "error",

extensions/ql-vscode/package-lock.json

@@ -2024,6 +2024,7 @@
     "eslint": "^8.56.0",
     "eslint-config-prettier": "^9.0.0",
     "eslint-import-resolver-typescript": "^3.6.1",
+    "eslint-plugin-deprecation": "^2.0.0",
     "eslint-plugin-etc": "^2.0.2",
     "eslint-plugin-github": "^4.4.1",
     "eslint-plugin-import": "^2.29.1",