feat(debug): add a verbose mode to debug semantic-release

[clementprevot]

Fixes #79

Changes

When trying to debug my release config, I needed to access semantic-release debug mode. I come up with this solution

• [x] All the changes are mentioned in docs (readme.md)

[antongolub]

@clementprevot,

Accepted as a feat request, but 3 flags for logging seems to much. I'm going to simplify the runner layer and introduce smth like log-level: verbose | debug | info | error.

[qiwibot]

:tada: This issue has been resolved in version 6.7.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: