chore(package): update @types/aws-lambda to version 8.10.10

Closes #28

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
   },
   "devDependencies": {
     "@koa/cors": "^2.2.1",
-    "@types/aws-lambda": "^0.0.35",
+    "@types/aws-lambda": "^8.10.10",
     "@types/http-errors": "^1.6.1",
     "@types/jest": "^22.2.2",
     "@types/node": "^10.0.3",