Update microee dependency

[harriha]

The microee dependency is locked to 0.0.2, which doesn't have a specific license attached to it. This is a bit of a problem when wanting to verify all licenses in a project using minilog. Could you consider bumping up the microee dependency to at least 0.0.3 where the license field was added?

This is related to mixu/microee#2 I just opened - if switching to SPDX-compliant license ID there, it would obviously be great to update the dependency here to that one instead of 0.0.3. Not sure if the functional changes in microee versions > 0.0.3 break this lib then, though :/.