TODO:

* flesh out actions in coinbasepro.pl

* Consider using App::Cmd

* Fix for CPANTS:  
    (SEE https://cpants.cpanauthors.org/release/JOSHR/Finance-CoinbasePro-API-CLI-0.004)

    meta_yml_declares_perl_version

    If you are using Build.PL define the {requires}{perl} = VERSION field. 
    If you are using MakeMaker (Makefile.PL) you should upgrade ExtUtils::MakeMaker 
    to 6.48 and use MIN_PERL_VERSION parameter. Perl::MinimumVersion can help you 
    determine which version of Perl your module needs.