Updated for Xcode 11.2 and Swift 5.1.2

[eswiss]

Updated my Xcode to version 11.2 and Swift to 5.1.2. Fixed one bug and removed the word "public" where not needed. Changed the "hashvalue" parameter to the "hash" function in several places. Updated several unit tests. Added the Gemfile.lock file to the .gitignore file.

[codecov[bot]]

Codecov Report

Merging #196 into master will decrease coverage by 0.41%. The diff coverage is 64.54%.

@@            Coverage Diff             @@
##           master     #196      +/-   ##
==========================================
- Coverage   98.71%   98.29%   -0.42%     
==========================================
  Files          85       86       +1     
  Lines        8781     9140     +359     
==========================================
+ Hits         8668     8984     +316     
- Misses        113      156      +43

Impacted Files	Coverage Δ
Sources/GeoFeatures/CoordinateCollectionType.swift	100% <ø> (ø)	:arrow_up:
...rces/GeoFeaturesQuartz/CGContext+GeoFeatures.swift	100% <ø> (ø)	:arrow_up:
Tests/GeoFeaturesTests/TokenizerTests.swift	97.43% <0%> (-2.57%)	:arrow_down:
...eaturesTests/CoordinateSystem+CartesianTests.swift	80% <0%> (-8.89%)	:arrow_down:
...aturesTests/CoordinateSystem+GeographicTests.swift	80% <0%> (-8.89%)	:arrow_down:
Sources/GeoFeatures/WKTReader.swift	99.23% <0%> (-0.77%)	:arrow_down:
...rces/GeoFeatures/CoordinateSystem+Geographic.swift	100% <100%> (ø)	:arrow_up:
...urces/GeoFeatures/CoordinateSystem+Cartesian.swift	100% <100%> (ø)	:arrow_up:
Sources/GeoFeatures/Floating.swift	100% <100%> (ø)	:arrow_up:
...artzTests/GeoFeatures+PathRepresentableTests.swift	100% <100%> (ø)	:arrow_up:
... and 20 more