chore(deps): bump vue-multiselect from 2.1.9 to 3.0.0

Bumps [vue-multiselect](https://github.com/suadelabs/vue-multiselect) from 2.1.9 to 3.0.0.
- [Release notes](https://github.com/suadelabs/vue-multiselect/releases)
- [Commits](https://github.com/suadelabs/vue-multiselect/commits)

---
updated-dependencies:
- dependency-name: vue-multiselect
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -50,7 +50,7 @@
     "vue-analytics": "5.22.1",
     "vue-head": "2.2.0",
     "vue-infinite-scroll": "2.0.2",
-    "vue-multiselect": "2.1.9",
+    "vue-multiselect": "3.0.0",
     "vue-property-decorator": "9.1.2",
     "vue-recaptcha": "1.3.0",
     "vue-router": "3.6.5",