[QGIS-Developer] Submit plugin to QGIS 3 repo

[Borys Jurgiel]

> So, for now the only solution is to add the missing max tag,

... or just set min to 3.0 and wait for tonight build :)

Now master's plugin compatibility is fully hardcoded as 3.0:
https://github.com/qgis/QGIS/commit/7c01b7e6478

Regards,
Borys