chore: update test utils

I would like to migrate to happy-dom instead of jsdom, as it seems to be near 50% faster, which, when all components start containing many tests, could be a substantial time saver. However, I haven't been able to get it to work out of the box. So I will probably try later.

Author: VividLemon

packages/bootstrap-vue-3/package.json

@@ -44,15 +44,15 @@
     "@vue/shared": "^3.2.37",
     "@vue/test-utils": "^2.0.0-rc.18",
     "bootstrap": "5.x.x",
-    "jsdom": "^19.0.0",
+    "jsdom": "^20.0.0",
     "rollup": "^2.76.0",
     "rollup-plugin-visualizer": "5.x.x",
     "sass": "1.x.x",
     "tsconfig": "workspace:*",
     "typescript": "4.x.x",
     "vite": "2.x.x",
     "vite-plugin-dts": "1.x.x",
-    "vitest": "^0.10.4",
+    "vitest": "^0.20.3",
     "vue": "3.x.x",
     "vue-router": "4.x.x",
     "vue-tsc": "^0.37.2"