Fix test environment

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Author: ChristophWurst

package.json

@@ -43,5 +43,8 @@
   "engines": {
     "node": "^16.0.0",
     "npm": "^7.0.0 || ^8.0.0"
+  },
+  "jest": {
+    "testEnvironment": "jsdom"
   }
 }