Now evaluates whether there are any flags and/or any options when pro…

…viding the default `"flags_and_options_string"` (#12)

* Now evaluates whether there are any flags and/or any options when providing the default `"flags_and_options_string"`

* version

0.3.1

Squashed commit of the following:

commit c95a3ad
Author: Matt Wilson <152443343+mwsis@users.noreply.github.com>
Date:   Mon May 12 12:58:22 2025 +1000

    Argv0 (#11)

    * updated dependencies

    * ~ fixed handling of value indexes

    * release

~ updated dependencies so as to obviate security issue with 'minimist'

~ updated dependencies so as to obviate security issue with 'lodash <…

… 4.17.13'

~ updated dependencies so as to obviate security issue with 'js-yaml …

…< 3.13.1'

~ fixing dependencies from 'dependencies' to 'devDependencies'

+ added various utility functions, examples, etc. - first releasable …

…version