Update dependency vuepress to v1

Author: renovate-bot

Diff for: package.json

@@ -4,6 +4,6 @@
     "docs:build": "vuepress build docs"
   },
   "devDependencies": {
-    "vuepress": "0.9.0"
+    "vuepress": "1.0.3"
   }
 }