chore(package): update @types/validator to version 13.0.0

Closes #36

Author: greenkeeper[bot]

package.json

@@ -52,7 +52,7 @@
     "@types/chai": "^4.2.0",
     "@types/joi": "^14.3.3",
     "@types/mocha": "^5.2.7",
-    "@types/validator": "^10.11.2",
+    "@types/validator": "^13.0.0",
     "@typescript-eslint/eslint-plugin": "^1.13.0",
     "@typescript-eslint/parser": "^1.13.0",
     "aws-sdk-mock": "^4.5.0",