v1.3.1

What's Changed

• Switch to framesorter class by @michaelonken in #484
• Use label id as segment numbers by @michaelonken in #485
• Fix order of pixel spacing converting ITK->DICOM by @michaelonken in #486
• Fix publishing of docker images by @fedorov #487

Full Changelog: v1.3.0...v1.3.1