Address backwards incompatible API changes from the geopandas 1.0 release

[joshuacortez]

Describe the problem and proposed solution
Geopandas 1.0 just got released recently. We would need to address backwards incompatible API changes in our existing codebase.

The most relevant I think are

• The sjoin method will now preserve the name of the index of the right
  GeoDataFrame, if it has one, instead of always using "index_right" as the
  name for the resulting column in the return value
• The deprecated default value of GeoDataFrame/ GeoSeries explode(.., index_parts=True) is now
  set to false for consistency with pandas