Bump vue-router from 3.1.5 to 3.1.6 in /client

Bumps [vue-router](https://github.com/vuejs/vue-router) from 3.1.5 to 3.1.6.
- [Release notes](https://github.com/vuejs/vue-router/releases)
- [Changelog](https://github.com/vuejs/vue-router/blob/dev/CHANGELOG.md)
- [Commits](vuejs/vue-router@v3.1.5...v3.1.6)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

client/package-lock.json

@@ -15,7 +15,7 @@
     "jsoneditor": "^7.0.5",
     "register-service-worker": "^1.6.2",
     "vue": "^2.6.11",
-    "vue-router": "^3.1.5",
+    "vue-router": "^3.1.6",
     "vuetify": "^2.2.15",
     "vuex": "^3.1.2"
   },