Merge pull request #2340 from cjihrig/node-test-runner

test: replace mocha with node:test

Author: k8s-ci-robot

.mocharc.json

@@ -177,7 +177,7 @@ Run `npm run lint` or install an editor plugin.
 
 # Testing
 
-Tests are written using the [Mocha](https://mochajs.org/) test runner and
+Tests are written using the [`node:test`](https://nodejs.org/api/test.html) test runner and
 [`node:assert`](https://nodejs.org/api/assert.html) assertion library. See
 [`config_test.ts`](./src/config_test.ts) for an example.