Merge pull request bigcommerce#826 from mcampa/dev

Cornerstone 1.3 merge to master

1.2.2 release

Merge pull request bigcommerce#812 from mickr/v1.2.1-release

MERC-717 - Bump Cornerstone to v1.2.1

i10

i9

MERC-612: bump version to 1.2.0

i8

i7

i6