'go get' is no longer supported

[danielbosc]

The current /readme.md references old "go get" install method which is no longer supported. I was able to install using the below command. We may want to update the documentation.

go install github.com/appgate/sdp-api-client-go/api/v19/openapi@latest

[kajes]

go get is only unsupported for installing executables. The API client, however, is supposed to be used as a package dependency, so go get is still the correct one to use in this context.

See the official note on this: https://go.dev/doc/go-get-install-deprecation