v1.2.1

What's Changed

• Patch to fix vignette typo, update author list by @daynefiler in #4
• issue-01: added txpExportGui by @daynefiler in #6
• issue-08: require R>4.0 by @daynefiler in #9
• v1.2.0 by @daynefiler in #12

Full Changelog: v1.0.2...v1.2.0