src:chipmunk is a shared library that isn't currently used by anything in Debian and hasn't had an upload since 2013.
If you have a use for this package, please upload the pending changes from
games-team git (see #900448). Updating from upstream version 6 to 7 would
probably also be valuable, although it's likely to be significant work.
Otherwise, I will ask for it to be removed from Debian on or after
2020-05-01 (that's in 2 weeks' time).
Thanks,
smcv
