chore(deps): update embroider monorepo to v4

Author: renovate[bot]

packages/test-app/package.json

@@ -35,8 +35,8 @@
     "@ember/optional-features": "2.1.0",
     "@ember/string": "4.0.1",
     "@ember/test-helpers": "4.0.5",
-    "@embroider/compat": "3.6.5",
-    "@embroider/core": "3.4.20",
+    "@embroider/compat": "4.0.2",
+    "@embroider/core": "4.0.2",
     "@embroider/webpack": "4.0.9",
     "@glimmer/component": "1.1.2",
     "@glimmer/tracking": "1.1.2",