Official support for Go version 1.13

The docs refer to 1.11 and 1.12 version of Go, and at time of our initial Go format support, only these versions were fully tested with NXRM.

Version 1.13 has some impacting changes that may make using it more complicated or incomplete. Things like checksum database, private modules, etc.

From https://golang.org/doc/go1.13 :

As of Go 1.13, the go command by default downloads and authenticates modules using the Go module mirror and Go checksum database run by Google. See https://proxy.golang.org/privacy for privacy information about these services and the go command documentation for configuration details including how to disable the use of these servers or use different ones. If you depend on non-public modules, see the documentation for configuring your environment.

https://tip.golang.org/cmd/go/#hdr-Module_authentication_failures
https://tip.golang.org/doc/go1.13#modules
https://tip.golang.org/cmd/go/#hdr-Module_configuration_for_non_public_modules

Expected

Confirm that 1.13 features can work with NXRM and identify any that do not.

Document how to use working Go 1.13 features with NXRM.