Describe and test the usage only with flatconfig. It'll be the only config format soon. Who needs to retain .eslintrc can stay with eslint 8.
ESLint 9 supports only Node.js ^18.18.0 || ^20.9.0 || >=21.1.0.
The formatter eslint-tap works, but because it doesn't follow the NPM package naming convention eslint-formatter-*, it has to be specified using a path to the script with the main exports.
Upgrade the eslint dependency. Change the documentation and tests to use the new configuration format. Also, upgrade Node.js in the build pipeline.
https://eslint.org/blog/2023/10/flat-config-rollout-plans/#eslintrc-removed-in-eslint-v10.0.0
.eslintrccan stay with eslint 8.^18.18.0 || ^20.9.0 || >=21.1.0.eslint-tapworks, but because it doesn't follow the NPM package naming conventioneslint-formatter-*, it has to be specified using a path to the script with the main exports.Fixes #173