chore(deps): bump vuex from 3.0.1 to 3.1.0

Bumps [vuex](https://github.com/vuejs/vuex) from 3.0.1 to 3.1.0.
- [Release notes](https://github.com/vuejs/vuex/releases)
- [Commits](https://github.com/vuejs/vuex/compare/v3.0.1...v3.1.0)

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

package.json

@@ -20,7 +20,7 @@
     "vue": "^2.5.22",
     "vue-i18n": "^8.7.0",
     "vue-router": "^3.0.2",
-    "vuex": "^3.0.1",
+    "vuex": "^3.1.0",
     "vuex-router-sync": "^5.0.0"
   },
   "devDependencies": {