fix: logger aren't accessible due to duplicated pointer

[42atomys]

Description

Handler are sent to registry over a double pointer causing inaccessible handler features.

Changes

• Use a pointer instead of double pointer.

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.
• [x] 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
registry/backward/backward.go	84.6% <100.0%> (ø)
registry/checksum/checksum.go	84.6% <100.0%> (ø)
registry/conversion/conversion.go	90.0% <100.0%> (ø)
registry/encoding/encoding.go	92.0% <100.0%> (ø)
registry/env/env.go	81.8% <100.0%> (ø)
registry/filesystem/filesystem.go	89.4% <100.0%> (ø)
registry/maps/maps.go	91.6% <100.0%> (ø)
registry/numeric/numeric.go	93.1% <100.0%> (ø)
registry/random/random.go	88.8% <100.0%> (ø)
registry/reflect/reflect.go	88.2% <100.0%> (ø)
... and 7 more