Update package.json

Author: ghzhost

package.json

@@ -4,8 +4,8 @@
   "description": "Serverless API to take screenshots of websites with Puppeteer.",
   "dependencies": {
     "chrome-aws-lambda": "5.2.1",
-    "puppeteer-core": "5.2.1"
-    "express": "^4.17.1"
+    "puppeteer-core": "5.2.1",
+    "express": "^4.17.1",
   },
   "devDependencies": {
     "typescript": "4.1.5"