List installed Perl modules, and the version installed

    CLI Example:

    .. code-block:: bash

        salt '*' cpan.list

def list_():
    '''
    List installed Perl modules, and the version installed

    CLI Example:

    .. code-block:: bash

        salt '*' cpan.list
    '''
    ret = {}
    cmd = 'cpan -l'
    out = __salt__['cmd.run'](cmd).splitlines()
    for line in out:
        comps = line.split()
        ret[comps[0]] = comps[1]
    return ret