chore(package): update @types/mocha to version 5.0.0

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "@types/aws-lambda": "^0.0.33",
     "@types/chai": "^4.0.4",
     "@types/chance": "^1.0.0",
-    "@types/mocha": "^2.2.44",
+    "@types/mocha": "^5.0.0",
     "@types/node": "^9.3.0",
     "@types/request": "^2.0.8",
     "@types/request-promise-native": "^1.0.10",