Add support for Golang 1.18

[mnaser]

The following takes care of making this build on recent version of Golang. It depends on the following:

boz/kcache#6

Once that is merged and a new release is tagged, I can (or any of the maintainers can feel free to) remove the replace and point towards the latest before landing this.

Related: #68

[mnaser]

@boz small friendly ping on this, we've been using this internally for a while and it's working great.

if you're too busy, I'm happy to be added as a maintainer for both of these repos to help continue to maintain kail since it's a super useful tool in my (and my teams) toolset.

[mnaser]

I'd really like to avoid potentially forking kail -- would it be possible to be added as a maintainer to kcache and kail, @boz ?

[benmoss]

Thanks for doing this work @mnaser, I was also looking to use kail as a library for a project and I'm using your fork instead 😄

[mnaser]

@boz kail is instrumental in my and my teams work, would it be possible to add me as a maintainer so I can help keep the project running if you're low on bandwidth?

[boz]

I'm so sorry @mnaser!

I've added you as a collaborator, you're welcome to merge.