Update quantified dependency version

Bump up version

Attempt to modernize gem versions

Fix Fixnum deprecation

Bump version to 2.1.1 (Shopify#536)

Bump to version 2.1.0 (Shopify#531)

Merge pull request Shopify#528 from Shopify/bump_version_2_0_1

Bump to version 2.0.1

Bump tags to v2.0.0

Bump to v1.14.2

Release v1.14.1 (Shopify#517)