chore(package): update @types/aws-lambda to version 0.0.18

Author: greenkeeper[bot]

package.json

@@ -11,7 +11,7 @@
     ]
   },
   "devDependencies": {
-    "@types/aws-lambda": "^0.0.17",
+    "@types/aws-lambda": "^0.0.18",
     "@types/node": "^8.0.16",
     "ava": "^0.23.0",
     "husky": "^0.14.3",