Maintenance update of `globals` to `v14`

Only breaking change is the dropping of old Node.js versions but it still support all versions that `@eslint/eslintrc` supports.

The one impactful thing it does though is that it removes the only dependency – replacing an outdated `type-fest` module with built-in types – making it so that everyone that installs `eslint` doesn't also get an outdated `type-fest` and thus doesn't have to contend with it in their `npm` deduping and hoisting.

Relevant PR: sindresorhus/globals#209

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