Update TypeScript package.json templates (#3339)

Author: ejizba

src/Azure.Functions.Cli/StaticResources/package-ts-v4.json

@@ -6,16 +6,18 @@
   "scripts": {
     "build": "tsc",
     "watch": "tsc -w",
-    "prestart": "npm run build",
+    "clean": "rimraf dist",
+    "prestart": "npm run clean && npm run build",
     "start": "func start",
     "test": "echo \"No tests yet...\""
   },
   "dependencies": {
-    "@azure/functions": "^4.0.0-alpha.1"
+    "@azure/functions": "^4.0.0-alpha.9"
   },
   "devDependencies": {
     "azure-functions-core-tools": "^4.x",
     "@types/node": "18.x",
-    "typescript": "^4.0.0"
+    "typescript": "^4.0.0",
+    "rimraf": "^5.0.0"
   }
 }

src/Azure.Functions.Cli/StaticResources/package-ts.json

@@ -13,7 +13,7 @@
   "devDependencies": {
     "@azure/functions": "^3.0.0",
     "azure-functions-core-tools": "^4.x",
-    "@types/node": "16.x",
+    "@types/node": "18.x",
     "typescript": "^4.0.0"
   }
 }