build(deps-dev): bumps test-runner back down to 0.19 to support tests

Author: iOvergaard

package-lock.json

@@ -77,7 +77,7 @@
     "@types/chai": "5.2.2",
     "@types/mocha": "10.0.10",
     "@web/dev-server-esbuild": "0.4.3",
-    "@web/test-runner": "0.20.2",
+    "@web/test-runner": "0.19.0",
     "@web/test-runner-commands": "0.9.0",
     "@web/test-runner-playwright": "0.11.1",
     "autoprefixer": "10.4.21",