Upgrade eslint-etc to v5.2.1

[garycourt]

I'm getting the following warning when installing eslint-plugin-etc with Typescript 5+.

warning "eslint-plugin-etc > eslint-etc@5.1.0" has incorrect peer dependency "typescript@^4.0.0".
warning "eslint-plugin-etc > eslint-etc > tsutils-etc@1.4.1" has incorrect peer dependency "typescript@^4.0.0".

This plugin has a dependency on eslint-etc@5.1.0, which doesn't official support Typescript 5. The latest release of eslint-etc does officially support Typescript 5.

This issue is requesting that eslint-etc be bumped to version 5.2.1, which should solve the above warning.