geopackage support

[margrietpalm]

• Add geopackage schematisation to test data
• Use geopackage, instead of spatialite, for tests
• Add geopackage to schematisations tested in integration test

Currently using threedi-schema==0.219.2.dev1. I will change that once https://github.com/nens/threedi-schema/pull/55 is merged and a new threedi-schema is released.