release 2.2.2

fix no-element exception when href is absent
update Dart SDK to 2.19 or later
update XML to 6.3.0

release 2.2.1

• fixed missed symbol during writing

v2.1.1: release 2.1.0

- fix GpxReader to read CDATA elements

v2.1.0: release 2.1.0

• Add option to KmlWriter to specify (absolute, clampToGround, relativeToGround)

v2.0.0

• null safety support (dart sdk 2.12.0, xml 5.0.0)

v1.1.1

• fix hashCode calculation for GPX objects

v1.1.0

release 1.1.0

• add FixType (2d, 3d, dgps, none, pps) reading and writing

v1.0.1+2

release 1.0.1+2