feat: upgrade plugin template dependencies

[bmish]

• https://github.com/not-an-aardvark/eslint-plugin-eslint-plugin/releases/tag/v5.0.0
• https://github.com/mochajs/mocha/releases/tag/v10.0.0

Since these major version updates dropped Node 12 support, this PR depends on us also dropping Node 12 support:

• feat!: drop Node 12/17 support #135

[eslint-github-bot]

Hi @bmish!, thanks for the Pull Request

The first commit message isn't properly formatted. We ask that you update the message to match this format, as we use it to generate changelogs and automate releases.

• The commit message tag wasn't recognized. Did you mean "docs", "fix", or "feat"?

To Fix: You can fix this problem by running git commit --amend, editing your commit message, and then running git push -f to update this pull request.

Read more about contributing to ESLint here

[eslint-github-bot]

Hi @bmish!, thanks for the Pull Request

The first commit message isn't properly formatted. We ask that you update the message to match this format, as we use it to generate changelogs and automate releases.

• The commit message tag wasn't recognized. Did you mean "docs", "fix", or "feat"?

To Fix: You can fix this problem by running git commit --amend, editing your commit message, and then running git push -f to update this pull request.

Read more about contributing to ESLint here

[nzakas]

Is there a reason this shouldn’t be combined with #135?