Bump vue-select from 2.6.4 to 3.20.3 in /ui (#539)

Bumps [vue-select](https://github.com/sagalbot/vue-select) from 2.6.4 to 3.20.3.
- [Release notes](https://github.com/sagalbot/vue-select/releases)
- [Changelog](https://github.com/sagalbot/vue-select/blob/master/release.config.js)
- [Commits](sagalbot/vue-select@v2.6.4...v3.20.3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

ui/core/package.json

@@ -67,7 +67,7 @@
     "vue-range-slider": "^0.6.0",
     "vue-router": "^3.0.1",
     "vue-scrollto": "^2.11.0",
-    "vue-select": "^2.4.0",
+    "vue-select": "^3.20.3",
     "vue-tour": "^2.0.0",
     "vuedraggable": "^2.16.0",
     "vuep": "^0.8.1",

ui/wallet/package.json

@@ -59,7 +59,7 @@
     "vue-range-slider": "^0.6.0",
     "vue-router": "^3.0.1",
     "vue-scrollto": "^2.11.0",
-    "vue-select": "^2.4.0",
+    "vue-select": "^3.20.3",
     "vue-tour": "^2.0.0",
     "vuedraggable": "^2.16.0",
     "vuep": "^0.8.1",

ui/yarn.lock

@@ -12011,10 +12011,10 @@ vue-scrollto@^2.11.0:
   dependencies:
     bezier-easing "2.1.0"
 
-vue-select@^2.4.0:
-  version "2.6.4"
-  resolved "https://registry.yarnpkg.com/vue-select/-/vue-select-2.6.4.tgz#cb82ea3417a4b0f68101f53528ba1c0b04de5308"
-  integrity sha512-OZIzzGlYwro2QcgAmcn2c4LQDPrYIT3+iaf4WciKPIeFFjgzRti6FC5Qjr2XEPqd85wqtsifuYyxsyb/JoJ4CQ==
+vue-select@^3.20.3:
+  version "3.20.3"
+  resolved "https://registry.yarnpkg.com/vue-select/-/vue-select-3.20.3.tgz#559b0ba2780171e4eeda455ebce5f3ce708380eb"
+  integrity sha512-aDaq4rPBrDavh7NDLgAP8e0G8UNElh6vO3itGWjhf1y9KaGRWtFw21cUkSRHGgj0V5FlCG4EaRb1xdE/C9J+eg==
 
 vue-style-loader@^4.1.0, vue-style-loader@^4.1.2:
   version "4.1.3"