MIGRATE4_OPTION_TYPE_MISMATCH when attempting to upgrade to 2015.3.x

[gepandz]

Hi! We are using this module in our 3.8 environment and are looking to go to PE 2015.3.1. That requires that we go to Puppet Language v4 (grumble...), and this module (at tag:v1.7.2) throws the following errors from the catalog_preview tool:

Preview Warnings (by issue)
MIGRATE4_OPTION_TYPE_MISMATCH (1)
/etc/puppetlabs/puppet/environments/ftr_test_puppet4/modules/wget/manifests/fetch.pp:147:5

The line is:

... case $source_hash{
'', undef: {
$command = "wget ${verbose_option}${nocheckcert_option}${no_cookies_option}${header_option}${user_option}${output_option}${flags_joined} "${source}""
...

Apparently, in Puppet Language 4, this throws an error because an empty string will never match a hash object, so it's a syntax error. (https://forge.puppetlabs.com/puppetlabs/catalog_preview#migration-warnings).

Is this already fixed in a higher version that we just aren't pulling in, yet? Thanks!