chore(deps): update dependency rollup to v4

Author: renovate[bot]

ember-velcro/package.json

@@ -91,7 +91,7 @@
     "eslint-plugin-qunit": "^7.3.1",
     "npm-run-all2": "^5.0.0",
     "prettier": "^2.7.1",
-    "rollup": "^2.79.1",
+    "rollup": "^4.0.0",
     "rollup-plugin-copy": "^3.4.0",
     "rollup-plugin-ts": "^3.0.2",
     "typescript": "^5.0.0",