CLI cannot explicitly re-enable lint/dead-code when config disables them

[Taiki92777]

Summary

react-doctor cannot explicitly re-enable lint / deadCode from CLI when those are disabled in config.

Current behavior

If config sets:

{
  "lint": false,
  "deadCode": false
}

you can disable via --no-lint / --no-dead-code, but cannot re-enable using --lint / --dead-code because those flags do not exist.

Why this is a problem

README says CLI flags override config, but this only works one-way for booleans.

Reproduction

1. Create react-doctor.config.json with lint: false and deadCode: false.
2. Run react-doctor ..
3. Try to force-enable checks from CLI.

Observed:

• --lint -> unknown option
• --dead-code -> unknown option

Expected behavior

--lint and --dead-code should exist and override config values to true.

[Taiki92777]

Proposed fix is in PR #54: #54

[aidenybai]

Fixed in #68: added --lint and --dead-code positive CLI flags to override config.