v1.5.0: Merge pull request #226 from twpayne/geojson-tweaks

GeoJSON tweaks

v1.4.3

• Tolerate minor differences in floating point results to support FMA

v1.4.2

• Fix floating point precision failure caused by FMA on ppc64le, thanks @prashantkhoje

v1.4.1

• Fix common-case panic in convex hull calculation (thanks @chrisdinn).

v1.4.0

• Improve handling of GeometryCollections (thanks @otan).
• Add top level SetSRID function.
• New WKT parser (thanks @andyyang890).
• Add Reverse method (thanks @engelsjk).

v1.3.6

• multipolygon: fix Polygon(i) function with EMPTY preceding MULTIPOLYGONs

v1.3.5

• geojson: fix rune cast for Go 1.15
• encoding/wkt: fix handling of collections with empty elements

v1.3.4

Merge pull request #183 from twpayne/update-dependencies

Update dependencies

v1.3.2

• encoding/geojson: fix encoding POINT EMPTY with options

v1.3.1

• encoding/geojson: correctly handle EMPTY geometries
• encoding: switch tests to use testify
• bigxy, sorting, transform: convert to testify for tests