tools: enable more eslint rules

This commit enables these new in ESLint 6.7.0 rules:

- no-constructor-return
- no-dupe-else-if
- no-setter-return

PR-URL: https://github.com/nodejs/node/pull/30598


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>