chore(package): update standard-version to version 5.0.1

Closes #2

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "husky": "^1.1.3",
     "prettier": "^1.14.3",
     "pretty-quick": "^1.8.0",
-    "standard-version": "^4.4.0",
+    "standard-version": "^5.0.1",
     "typescript": "^3.1.6"
   },
   "description": "Helper types for testing your package exported types",