RUSTSEC-2020-0112 ButtplugFutureStateShared allows data race to (!Send|!Sync) objects

ButtplugFutureStateShared implements Send & Sync regardless of T. If T: !Send for ButtplugFutureStateShared, it is possible to move non-Send types across thread boundaries e.g. T=Rc and lead to undefined behavior. If T: !Sync for ButtplugFutureStateShared, it is possible to cause data race to T...