fix: default logger have a bad init

[42atomys]

Description

The default logger aren't initialized correctly causing crash when using the default logger without opts.

Changes

• The default logger will now print on stdout

Checklist

• [x] I have read the CONTRIBUTING.md document.
• [x] My code follows the code style of this project.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.
• [x] I have updated the documentation accordingly.
• [ ] This change requires a change to the documentation on the website.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Files	Coverage Δ
sprout.go	100.0% <100.0%> (ø)