New release & modules support

[philtay]

Could you please cut a new release? Please also add a go.mod file in the repository root. Thanks!

[l3pp4rd]

hi, is there a sane reason to add go.mod if this library has no dependencies?

[philtay]

https://github.com/golang/go/wiki/Modules#should-i-still-add-a-gomod-file-if-i-do-not-have-any-dependencies