Backport #534 (PostGIS support) to series/0.6.x

[mpilquist]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 18 lines in your changes are missing coverage. Please review.

Comparison is base (7aa2b11) 84.29% compared to head (59f6d42) 85.47%.

Files	Patch %	Lines
modules/postgis/src/main/scala/geometry.scala	80.35%	11 Missing ⚠️
modules/postgis/src/main/scala/ewkb/codecs.scala	93.65%	4 Missing ⚠️
modules/postgis/src/main/scala/ewkt/parser.scala	97.46%	2 Missing ⚠️
modules/postgis/src/main/scala/ewkb/domain.scala	98.03%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           series/0.6.x    #1029      +/-   ##
================================================
+ Coverage         84.29%   85.47%   +1.17%     
================================================
  Files               126      132       +6     
  Lines              1738     2003     +265     
  Branches            180      231      +51     
================================================
+ Hits               1465     1712     +247     
- Misses              273      291      +18     

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