Merge pull request #14 from nut-tree/greenkeeper/@types/node-12.0.0

Update @types/node to the latest version 🚀

Author: s1hofmann

package-lock.json

@@ -26,7 +26,7 @@
   "homepage": "https://github.com/nut-tree/secrets#readme",
   "devDependencies": {
     "@types/jest": "^24.0.11",
-    "@types/node": "^11.13.0",
+    "@types/node": "^12.0.0",
     "jest": "^24.5.0",
     "ts-jest": "24.0.2",
     "tslint": "^5.14.0",