[Cryptech Tech] need SHA-224 support

[Rob Austein]

At Wed, 01 Jun 2016 08:09:01 +0200, Joachim Strömbergson wrote:
> 
> I actually wrote about it both in the commit message and in the README.

So you did.  0.81 => 1.00 would not have puzzled me, nor would 0.81 =>
1.81.  It was 0.81 => 1.80 that seemed a bit odd.  But, whatever.

> I bumped the major number since the new functionality changed the
> behaviour of the API in a non-ignorable way. From other open projects,
> these types of changes means an increase in major number as far as I
> understand it.

Entirely reasonable.