Relax plailude dependency to <0.3

We need to bump this to avoid dependency exhaustion in tempuhs-server,
which needs the new version of plailude.

Signed-off-by: Alexander Berntsen <alexander@plaimi.net>
Signed-off-by: Stian Ellingsen <stian@plaimi.net>
Reviewed-by: Stian Ellingsen <stian@plaimi.net>