version: bump to 2.0.0

Merge pull request Shopify#101 from Shopify/update-makefile

Update Makefile, README and CHANGELOG

Tweak the makefile and readme

Tweak the makefile and readme

Bump to 1.2.1

Bump to 1.2.0

Update version to 1.1.0

Bump version

version: bump to 1.0.2

release: 1.0.1