Beast-mcmc2 upgrade is missing class net.jsign.JsignTask

[Andreas Tille <andreas@an3as.eu>]

Hi Pierre (and others who like to have a look),

I tried to upgrade beast-mcmc2 to the latest upstream but ended up with:

...
dh_auto_build
        ant -Duser.name debian
Buildfile: /build/beast2-mcmc-2.6.3+dfsg/build.xml

BUILD FAILED
/build/beast2-mcmc-2.6.3+dfsg/build.xml:296: taskdef class net.jsign.JsignTask cannot be found
 using the classloader AntClassLoader[]

Total time: 0 seconds
dh_auto_build: error: ant -Duser.name debian returned exit code 1
...

Any idea what to do?  Seems like a new dependency[2] but I want to make
sure whether I'm right here and whether we really need this since it
sounds pretty unrelated to that program.

Kind regards

       Andreas.

[1] https://salsa.debian.org/med-team/beast2-mcmc
[2] https://ebourg.github.io/jsign/

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