Make golang 1.20 the default for development and CI
As more GitLab projects upgrade to use golang 1.20.x, we should also. To be clear, as stated at https://docs.gitlab.com/ee/development/go_guide/go_upgrade.html#supporting-multiple-go-versions:
These 3 requirements may easily be satisfied by keeping support for the 3 latest minor versions of Go.
So for now, go.mod
will remain untouched until golang 1.21 is released.
Related: #615 (closed)
Edited by Ash McKenzie