release version 1.6.5

Race condition (#278)

Add link to usage example (#277)

update readme

release version 1.6.4

Resolve reflection warnings + add underscores to some unused params (#275)

Update README.md (#273)

release version 1.6.3

release version 1.6.2

update changelog

release version 1.6.1

Add functionality for squashing migrations (#271)

release version 1.6.0

Warn on multiple statements without delimiter (#270)

update circleci image