Update MANIFEST.in (#1085)

also test branch protection rules

Author: rieder

MANIFEST.in

@@ -30,8 +30,6 @@ recursive-exclude doc/build *.*
 recursive-exclude src *.pyc *.o *~ .pc ccache *.a
 recursive-exclude lib *.pyc *.o *~ ccache *.a
 
-prune lib/ibis
-
 prune src/amuse/community/mesa/src
 prune src/amuse/community/mpiamrvac/src
 prune src/amuse/community/mpiamrvac/.pc