fix: upgrade vue-select from 3.18.3 to 3.20.2

Snyk has created this PR to upgrade vue-select from 3.18.3 to 3.20.2.

See this package in npm:


See this project in Snyk:
https://app.snyk.io/org/lissy93/project/564ca11b-8665-48b8-befa-ccd607c3e09a?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -40,7 +40,7 @@
     "vue-json-tree-view": "^2.1.6",
     "vue-material-tabs": "0.1.5",
     "vue-router": "^3.5.3",
-    "vue-select": "^3.16.0",
+    "vue-select": "^3.20.2",
     "vue-swatches": "^2.1.1",
     "vue-toasted": "^1.1.28",
     "vuex": "^3.6.2"