chore(package): update jest to version 19.0.0 (#3)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -37,7 +37,7 @@
   },
   "homepage": "https://github.com/blakeembrey/node-servie-lambda",
   "devDependencies": {
-    "jest": "^18.1.0",
+    "jest": "^19.0.0",
     "rimraf": "^2.5.4",
     "tslint": "^4.3.1",
     "tslint-config-standard": "^4.0.0",