chore: fix npm run perf crashes

it was crashing as eslint treat the `.eslintrc.yml` to be js.
this commit changes the generated configs to `eslint.config.js`.

refs: eslint#16255 (comment)

.github/workflows/ci.yml

@@ -54,6 +54,8 @@ jobs:
       run: node Makefile mocha
     - name: Fuzz Test
       run: node Makefile fuzz
+    - name: perf
+      run: npm run perf
 
   test_on_browser:
     name: Browser Test