Consider using micro's logger constructors

[refs]

Context: https://github.com/micro/go-micro/blob/master/debug/log/memory/memory.go#L22-L34

[phil-davis]

@refs this is an old issue that was transferred from the archived ocis-pkg repo a few weeks ago.
Please close if no longer relevant.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 10 days if no further activity occurs. Thank you for your contributions.