v2.6.0
Fix sloughs and add GeoPackage export (v2.6.0) - Respect interior rings (holes) in visibility check so route goes around sloughs - Replace deprecated saveAs() with QgsVectorFileWriter.writeAsVectorFormatV3 - Default save format is GeoPackage; Shapefile and GeoJSON still available - Prompt user when target .gpkg already contains a TSP_Route layer