TST: skip plotting tests if matplotlib is not installed (#970)
TST: skip plotting tests if matplotlib is not installed (#970)


jdmcbr/geopandas,geopandas/geopandas,geopandas/geopandas,jorisvandenbossche/geopandas,geopandas/geopandas,jorisvandenbossche/geopandas,jdmcbr/geopandas,jorisvandenbossche/geopandas