Merge pull request IBM#1234 from Shopify/changelog-v1.20.0

Compile changelog for 1.20.0 release

Update changelog for 1.19.0

Merge pull request IBM#1165 from Shopify/changelog-1.18.0

Changelog for release 1.18.0

Merge pull request IBM#1108 from bai/update-changelog

Update CHANGELOG for 1.17.0

Prep for 1.16

Bump changelog

update changelog

Prep for version 1.13

Fix the year

Prep for v1.11