One JS not combined/inlined

I am very happy with this plugin. I use GTMetrix to check my page http://paleosmak.pl and I see one complain there:

The following external resources have small response bodies. Inlining the response in HTML can reduce blocking of page rendering.

http://paleosmak.pl/ should inline the following small resources:

http://paleosmak.pl/wp-content/plugins/email-subscription/assets/email-subscription.js

Is there anything your plugin could do about it?

https://wordpress.org/plugins/wp-super-minify/