bump version to 0.12.1
bump version to 0.12.1

Alexzhxy/shapesmith,vtange/shapesmith.next,bjnortier/shapesmith,Alexzhxy/shapesmith,bjnortier/shapesmith,vtange/shapesmith.next,Alexzhxy/shapesmith,bjnortier/shapesmith,vtange/shapesmith.next