Allow custom levels to override default and allow to remove default levels

[sooryranga]

Solves:

• Allows custom levels to override default levels provided by Pino
• If needed default values from Pino can be removed

Reference : #507

[mcollina]

Can you add this option to the docs?

[sooryranga]

@mcollina sure!

[sooryranga]

@mcollina Added to docs, let me know if you have any other requests!

[mcollina]

CI is failing. It seems Object.values is not available.

[sooryranga]

@mcollina I added additional tests as well, I am not sure why CI is failing. Its failing because there isn't enough tests for a function initialising line. Should I write more tests for it?

[mcollina]

On Node 6: https://travis-ci.org/pinojs/pino/jobs/426109727. You are using some
syntax that is not available there.

[sooryranga]

Updated to fit Node 6 API, still running into branch coverage problem. I covered all the cases that are possible with that function, not sure why its throwing that error.

[mcollina]

You can use npm run cov-ui to generate the code coverage report. There is a condition in 1-2 branches that it is not covered.

[sooryranga]

@mcollina I figured out which branches wasn't covered. All the tests are passing, let me know if you have any comments on the implementation!

[mcollina]

LGTM

[sooryranga]

@jsumners added the warning!

[jsumners]

LGTM

[mcollina]

LGTM

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.