* Upgrade base image tags and golangci-lint
* Upgrade golang and golangci-lint in travis-ci
* fix: tests, pointed out by golangci-lint and format files
* Upgrade dependencies
* update changelog
* fix: tests related to https://github.com/pusher/oauth2_proxy/pull/418
* Separate tests using go version build tags
* Update CHANGELOG
* Revert "Separate tests using go version build tags"
This reverts commit 9b7e65eb90cae954dc7b6316345d3207205d488a.
* fix test to support go1.14 and go1.13
Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>
