CLI does not correctly report version #79
Description
$ dvsim --version
usage: dvsim <cfg-hjson-file> [-h] [options]
dvsim: error: the following arguments are required: <cfg-hjson-file>
{{ message }}
$ dvsim --version
usage: dvsim <cfg-hjson-file> [-h] [options]
dvsim: error: the following arguments are required: <cfg-hjson-file>