[MacPorts] #58567: qca: update to 2.2.1 for botan2 compatibility

[René J.V. Bertin]

On Saturday June 08 2019 18:48:43 Chih-Hsuan Yen wrote:
>If you are going to submit a patch or a pull request for this update, I 
>will be glad to apply or merge it. I'm not interested in co-maintaining 
>qca in the long term, though.

https://github.com/macports/macports-ports/pull/4565

>there is a need as all reverse dependents seem to work without a botan 
>2.x port.

You mean *with* botan2? If the upgrade is "painless" (basically a rebuild from our point of view) then there indeed is little need to introduce a port:botan1

R.