chore(deps): upgrade to eslint v9

.github/workflows/rel.yml

@@ -14,6 +14,6 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Release Please
-        uses: google-github-actions/[email protected]
+        uses: googleapis/[email protected]
         with:
           token: ${{ secrets.GITHUB_TOKEN }}

eslint.config.js

@@ -0,0 +1,21 @@
+
+import stylistic from "@stylistic/eslint-plugin-js";
+import jsdoc from "eslint-plugin-jsdoc";
+import markdownPlugin from "eslint-plugin-markdown";
+
+export default {
+  languageOptions: {
+    parserOptions: {
+      ecmaVersion: "latest",
+      sourceType: "module"
+    },
+  },
+  plugins: {
+    "@stylistic/js": stylistic.configs["all-flat"],
+    "plugin:markdown/recommended": markdownPlugin.configs.recommended,
+    "jsdoc": jsdoc.configs.recommended,
+  },
+  rules: {
+    "jsdoc/require-file-overview": "off"
+  }
+}