chore(deps): bump vue-multiselect from 2.1.8 to 2.1.9

Bumps [vue-multiselect](https://github.com/shentao/vue-multiselect) from 2.1.8 to 2.1.9.
- [Release notes](https://github.com/shentao/vue-multiselect/releases)
- [Commits](shentao/vue-multiselect@v2.1.8...v2.1.9)

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

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

Author: dependabot[bot]

package-lock.json

@@ -69,7 +69,7 @@
     "vue-input-tag": "^2.0.7",
     "vue-loader": "^16.8.3",
     "vue-mapbox": "^0.4.1",
-    "vue-multiselect": "^2.1.8",
+    "vue-multiselect": "^2.1.9",
     "vue-router": "^3.6.5",
     "vue-template-compiler": "^2.7.16",
     "vue2-touch-events": "^3.2.3",