Libical 3.0.0 Release (I mean it this time :)

[Milan Crha]

On Fri, 2017-10-20 at 08:25 -0400, Allen Winter wrote:
> Last call for anything that needs to go into the 3.0.0 release.

	Hi,
that icaltimezone::changes thread safety [1] would be (more than) nice
to have, especially with so low release cadence libical project has.

> Please test.

Sure, I updated to commit e42de59f. I'll let you know if I spot
anything (evolution-data-server's 'make check' worked fine).
	Thanks and bye,
	Milan

[1] the "Use-after-free under icaltimezone_convert_time()" thread on
this mailing list, started on 2017-10-03