chore(deps): bump vue-router from 3.1.1 to 3.1.2 in /frontend (#834)

Bumps [vue-router](https://github.com/vuejs/vue-router) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/vuejs/vue-router/releases)
- [Changelog](https://github.com/vuejs/vue-router/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vue-router/compare/v3.1.1...v3.1.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

frontend/package-lock.json

@@ -11807,9 +11807,9 @@
       }
     },
     "vue-router": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/vue-router/-/vue-router-3.1.1.tgz",
-      "integrity": "sha512-RAFCIQjs4gbDV7YNH44c1GT0jXSTFvNhKh3o0xiA/UWI1EM7Eriv45n8kM+R8NZ58wXEGtKVaDVBlrXJBuM/Bg=="
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/vue-router/-/vue-router-3.1.2.tgz",
+      "integrity": "sha512-WssQEHSEvIS1/CI4CO2T8LJdoK4Q9Ngox28K7FDNMTfzNTk2WS5D0dDlqYCaPG+AG4Z8wJkn1KrBc7AhspZJUQ=="
     },
     "vue-style-loader": {
       "version": "4.1.2",

frontend/package.json

@@ -20,7 +20,7 @@
     "qrcode.vue": "^1.6.2",
     "vue": "^2.6.10",
     "vue-i18n": "^8.12.0",
-    "vue-router": "^3.1.1",
+    "vue-router": "^3.1.2",
     "vuex": "^3.1.1",
     "vuex-router-sync": "^5.0.0"
   },