Implement IsSimple on all Geometry types.

[tonystone]

Implementing isSimple with complete tests for all Geometry types.

[tonystone]

Current coverage is 97.31% (diff: 86.73%)

Diff Coverage	File Path
0%	new Sources/GeoFeatures/Segment.swift
0%	Sources/GeoFeatures/MultiPolygon+Geometry.swift
•••••• 60%	Sources/GeoFeatures/Polygon+Geometry.swift
••••••••• 94%	Sources/GeoFeatures/LineString+Geometry.swift
•••••••••• 100%	Sources/GeoFeatures/MultiPoint+Geometry.swift
•••••••••• 100%	Sources/GeoFeatures/Point+Geometry.swift
•••••••••• 100%	Sources/GeoFeatures/Geometry.swift

No coverage report found for master at 0136cb7.

Powered by Codecov. Last update 0136cb7...82b6c3d

[codecov-io]

Codecov Report

Merging #135 into master will decrease coverage by 0.59%. The diff coverage is 87.5%.

@@            Coverage Diff            @@
##           master     #135     +/-   ##
=========================================
- Coverage   99.37%   98.78%   -0.6%     
=========================================
  Files          40       40             
  Lines        2096     2228    +132     
  Branches      137      158     +21     
=========================================
+ Hits         2083     2201    +118     
- Misses         13       24     +11     
- Partials        0        3      +3

Impacted Files	Coverage Δ
Sources/GeoFeatures/MultiPolygon+Geometry.swift	89.65% <0%> (-10.35%)	:arrow_down:
Sources/GeoFeatures/Point+Geometry.swift	100% <100%> (ø)	:arrow_up:
Sources/GeoFeatures/MultiPoint+Geometry.swift	100% <100%> (ø)	:arrow_up:
Sources/GeoFeatures/Polygon+Geometry.swift	85.71% <40%> (-14.29%)	:arrow_down:
Sources/GeoFeatures/LineString+Geometry.swift	92.72% <91.01%> (-7.28%)	:arrow_down:
Sources/GeoFeatures/LinearRing+Geometry.swift	100% <0%> (ø)	:arrow_up:
Sources/GeoFeatures/MultiLineString+Geometry.swift	100% <0%> (ø)	:arrow_up:
... and 9 more