Update dependency eslint to v9

Author: renovate[bot]

package.json

@@ -52,7 +52,7 @@
     "codecov": "3.8.3",
     "enzyme": "3.11.0",
     "enzyme-adapter-react-15": "1.4.4",
-    "eslint": "4.19.1",
+    "eslint": "9.8.0",
     "eslint-config-google": "0.14.0",
     "eslint-config-mitodl": "0.2.1",
     "eslint-plugin-ava": "4.5.1",