This replaced the per-characteristic queues with a single shared queue,
which means that the characteristics will return from `written()` in the
exact order that the original writes arrived, even if the writes are
occuring across multiple different characteristics.
This work was funded by Planet Innovation.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
This replicates the failure described in #453 (which is fixed by #459.
Also adds a test for subscription.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
Jim Mussared