TST: Add tests of pathlib.Path for file i/o (#1205)
TST: Add tests of pathlib.Path for file i/o (#1205)

* Add tests of pathlib.Path for file i/o (Closes #1199).
* Also added gpkg to the drivers to test reading/writing.
geopandas/geopandas,jdmcbr/geopandas,jorisvandenbossche/geopandas,geopandas/geopandas,jdmcbr/geopandas,geopandas/geopandas,jorisvandenbossche/geopandas,jorisvandenbossche/geopandas