[PATCH] travis: use ppa:notmuch/notmuch

[David Bremner]

Daniel Kahn Gillmor <dkg at fifthhorseman.net> writes:

> On Sun 2019-05-05 19:48:47 -0300, David Bremner wrote:
>> Daniel Kahn Gillmor <dkg at fifthhorseman.net> writes:
>>> This should allow us to continue to use the Travis continuous
>>> integration build on the release branch.
>>
>> And on master as well, I guess.
>
> yes, it should work on both master and release.  Please let me know if
> it doesn't.

Seems to be good now with the updated PPA; pushed to master. I didn't
apply it to release yet at as that is currently buildable with
gmime-2.6. I guess it depends on how long before release again, whether
we should also switch the release branch to gmime-3.0 and the new PPA.

d