[Project_owners] update your extensions' maxVerison to 3.0.*

[Neil]

Onno Ekker wrote:

> I did change the maxVersion of my Thunderbird extension in place to 
> 3.0a1 and I noticed the compatibility range on AMO changed, but in the 
> extensions install.rdf it's still maxVersion 2.0.0.*.
>
> What's the point in changing this in-place if you still need a new xpi 
> with a new install.rdf?

I believe the idea is that during installation the Extension Manager 
looks for updates to see if the compatibility range has been changed.