Changed how tables are dropped such that spatialite related references are automatically removed.
Note that this requires spatialite 5 or newer! Therefore, ubuntu 20.04 has been removed from the tests. This is no problem for our servers or the modellers interface.
This PR was build upon https://github.com/nens/threedi-schema/pull/137/ which should be reviewed first!
Changed how tables are dropped such that spatialite related references are automatically removed.
Note that this requires spatialite 5 or newer! Therefore, ubuntu 20.04 has been removed from the tests. This is no problem for our servers or the modellers interface.