geos 0.2.0

• Added an experimental geos_inner_join() and geos_inner_join_keys() for
  potentially faster and/or more memory-efficient joins (#76, #66).
• Added the geos_basic_strtree() class and query methods to create tree
  indices from non-GEOS geometries while making fewer copies (#73, #66).
• Rewrote the GEOS-geometry construction code because of a bug that
  prevented it from being used for default conversion (#74, #56).
• Added support for new features in GEOS 3.11, including
  geos_line_merge(), geos_line_merge_directed(), geos_concave_hull(),
  geos_remove_repeated_points(), geos_hilbert_code(), and
  geos_transform_xy() (#69).
• Clarified documentation on make and unnest functions (#70, #68).