supercollider-sc3-plugins is marked for autoremoval from testing

[Debian testing autoremoval watch]

supercollider-sc3-plugins 3.9.1~repack-3 is marked for autoremoval from testing 
on 2020-07-02

It (build-)depends on packages with these RC bugs:
959439: supercollider: FTBFS with Boost 1.71