Background page (not script!) unsupported?

[thestonehead]

Type:

• [ x] bug
• feature
• enhancement
• question

Environment:

• OS: Windows 10
• Browser: Vivaldi
• Library Version: 1.1.0

I'm going to open a PR:

• yes
• [ x] no

Description:
I'm getting WER-E1 message that I'm lacking background script. Which is (kinda) true, because I'm using a background page. Which is an html page in which I have a script tag adding background script (and a non-module dependency). Since background pages are supported by extension specs, this library should support them too, I guess?