Upgrade to eslint 9.

tsconfig.json

@@ -1,12 +1,11 @@
 {
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "./tsconfig.base.json",
   "compilerOptions": {
-    "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
-    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    "outDir": "./lib",                        /* Redirect output structure to the directory. */
-    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
-    "strict": true,                           /* Enable all strict type-checking options. */
-    // "noImplicitAny": true,                    /* Raise error on expressions and declarations with an implied 'any' type. */
-    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "outDir": "./dist"
   },
-  "exclude": ["node_modules", "**/*.test.ts"]
+  "exclude": ["__fixtures__", "__tests__", "coverage", "dist", "node_modules"],
+  "include": ["src"]
 }