Update dependency docz to v1.3.1

Author: renovate-bot

package-lock.json

@@ -52,7 +52,7 @@
     "babel-eslint": "10.0.3",
     "babel-plugin-module-resolver": "3.2.0",
     "codecov": "3.5.0",
-    "docz": "1.3.0",
+    "docz": "1.3.1",
     "docz-theme-default": "1.2.0",
     "eslint": "6.3.0",
     "eslint-config-prettier": "6.1.0",