Bump to version 1.2.1
Bump to version 1.2.1

cryos/tomviz,mathturtle/tomviz,cryos/tomviz,OpenChemistry/tomviz,cryos/tomviz,OpenChemistry/tomviz,mathturtle/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,mathturtle/tomviz