update go mock to allow for both version and env sub-commands
update go mock to allow for both version and env sub-commands

natemccurdy/powerlevel9k,bhilburn/powerlevel9k,dritter/powerlevel9k,dritter/powerlevel9k,rjorgenson/powerlevel9k,natemccurdy/powerlevel9k,bhilburn/powerlevel9k,rjorgenson/powerlevel9k