deblur - waiting for updated sortmerna

[Steffen Möller <steffen_moeller@gmx.de>]

Hello,

I just pushed deblur to salsa, a tool in the qiime2 realm. Its tests
fail because our sortmerna is outdated (2.1, now at 4.2). This is
because its d/watch file was trapped in the earlier tag format on github
that started with the digit diretly, while anything since then has this
"v"-prefix. I changed the watch line with how dh_make puts it which is
"v"-agnostic.

Sortmerna has changed quite a bit in the meantime, from what I observed.
It is now a cmake project. Under my hand it does not compile because of
using -lpthread instead of mere -pthread -did not find it. If this is
easy for someone out here, please give it shot.

Many thanks

Steffen