Chrome web store warning that extension "may soon no longer be supported" (Manifest V2?)

[ashlassian]

On the web store there's a warning banner:

Might be related to the manifest V2 phase-out? Are y'all already looking into this?

[trumbitta]

Updated today and the extension was automatically turned off and removed from the store

[captbaritone]

cc @tyao1

[Asymons]

Being addressed by #166 , pretty sure Manifest V2 is the reason for it