Migrate eslint config to support eslint v9.0.0

https://eslint.org/docs/latest/use/configure/migration-guide#start-using-flat-config-files

Author: samkim

.eslintrc.js

@@ -0,0 +1,40 @@
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import globals from "globals";
+import tsParser from "@typescript-eslint/parser";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended,
+    allConfig: js.configs.all
+});
+
+export default [{
+    ignores: ["src/authzedapi/**/*", "src/*.test.js"],
+}, ...compat.extends(
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+), {
+    plugins: {
+        "@typescript-eslint": typescriptEslint,
+    },
+
+    languageOptions: {
+        globals: {
+            ...globals.browser,
+            ...globals.commonjs,
+        },
+
+        parser: tsParser,
+        ecmaVersion: 12,
+        sourceType: "script",
+    },
+
+    rules: {},
+}];

eslint.config.mjs

@@ -33,6 +33,8 @@
     "google-protobuf": "^3.21.4"
   },
   "devDependencies": {
+    "@eslint/eslintrc": "^3.1.0",
+    "@eslint/js": "^9.7.0",
     "@protobuf-ts/plugin": "^2.9.4",
     "@types/jasmine": "^5.1.4",
     "@types/jest": "^29.5.12",

package.json

@@ -73,7 +73,7 @@
     minimatch "^3.1.2"
     strip-json-comments "^3.1.1"
 
-"@eslint/js@9.7.0":
+"@eslint/js@9.7.0", "@eslint/js@^9.7.0":
   version "9.7.0"
   resolved "https://registry.yarnpkg.com/@eslint/js/-/js-9.7.0.tgz#b712d802582f02b11cfdf83a85040a296afec3f0"
   integrity sha512-ChuWDQenef8OSFnvuxv0TCVxEwmu3+hPNKvM9B34qpM0rDRbjL8t5QkQeHHeAfsKQjuH9wS82WeCi1J/owatng==