* Update Go to 1.20.
* Update CI orb.
* Update golangci-lint.
* Update Go modules.
* Use new landing page function.
Signed-off-by: SuperQ <superq@gmail.com>
Use standard Prometheus Community build infra.
* Update Go modules for new location
* Update references to github URLs
* Update for Go 1.17+
Signed-off-by: SuperQ <superq@gmail.com>