Update go version, add tools for verification and testing

[coreydaley]

Fixes #

Summary of Changes

PS: Make sure your PR includes/updates tests! If you need help with this part, just ask!

[catatsuy]

@coreydaley I saw you're planning to get rid of CircleCI settings. But, I've got a different idea that could be great for this project.

I've sent a Pull Request (#262 gorilla/securecookie#79) where I've switched CircleCI over to GitHub Actions. With this, we can still do all our old tests and even use the newest version of Go. It's like keeping the good stuff we had and making sure it works with any new Go versions too.

If we just delete CircleCI and don't replace it with something like GitHub Actions, we might mess up our tests or have issues with the newest Go. But with GitHub Actions, we keep our testing strong and up-to-date, which is really good for our work here.

I think my PR is a good move for the project. I hope you can take another look at it. Let me know if you've got any questions, okay?

[coreydaley]

@catatsuy Thank you for the pull request, we are currently working on swapping out circleci for github actions as part of the project transition, starting with gorilla/mux#718

[codecov]

Codecov Report

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