fix(ext): update TypeScript templates for ext:dev:init (#9629)

* fix(ext): update TypeScript templates for ext:dev:init

The default TypeScript extension template generated by `firebase ext:dev:init` was failing to build due to outdated dependencies and TypeScript configuration.

This commit updates the templates to:
- Bump the TypeScript version to `^5.3.0` in `package.json`.
- Add `"skipLibCheck": true` to `tsconfig.json`.
- Change the `firebase-functions` import to `firebase-functions/v1`.

These changes ensure that newly generated TypeScript extensions build successfully without any errors.

* Update CHANGELOG.md

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: joehan

CHANGELOG.md

@@ -0,0 +1 @@
+- Updated TypeScript templates for `ext:dev:init` to fix build failures (#9524)

templates/extensions/typescript/index.ts

@@ -8,7 +8,7 @@
  * https://firebase.google.com/docs/extensions/publishers
  */
 
-import * as functions from "firebase-functions";
+import * as functions from "firebase-functions/v1";
 
 exports.greetTheWorld = functions.https.onRequest(
   (req: functions.Request, res: functions.Response) => {

templates/extensions/typescript/package.lint.json

@@ -21,7 +21,7 @@
     "eslint": "^8.15.1",
     "eslint-plugin-import": "^2.26.0",
     "eslint-config-google": "^0.14.0",
-    "typescript": "^4.9.0",
+    "typescript": "^5.3.0",
     "axios": "^1.3.2",
     "chai": "^4.3.7",
     "mocha": "^10.2.0",

templates/extensions/typescript/package.nolint.json

@@ -14,7 +14,7 @@
   "devDependencies": {
     "@types/chai": "^4.3.4",
     "@types/mocha": "^10.0.1",
-    "typescript": "^4.9.0",
+    "typescript": "^5.3.0",
     "axios": "^1.3.2",
     "chai": "^4.3.7",
     "mocha": "^10.2.0",

templates/extensions/typescript/tsconfig.json

@@ -6,7 +6,8 @@
     "outDir": "lib",
     "sourceMap": true,
     "strict": true,
-    "target": "es2017"
+    "target": "es2017",
+    "skipLibCheck": true
   },
   "compileOnSave": true,
   "include": [