* update go version to 1.18 for api and sdk, go mod tidy
* removes ioutil usage everywhere which was deprecated in go1.16 in favour of io and os packages. Also introduces a lint rule which forbids use of ioutil going forward.
Co-authored-by: R.B. Boyer <4903+rboyer@users.noreply.github.com>
AutopilotServerHealthy now handles the 429 status code
Previously we would error out and not parse the response. Now either a 200 or 429 status code are considered expected statuses and will result in the method returning the reply allowing API consumers to not only see if the system is healthy or not but which server is unhealthy.