Version 0.3.1+dfsg-2 of r-cran-threejs is marked for autoremoval from testing on Mon 16 Sep 2019. It depends (transitively) on glewlwyd, affected by #925697. You should try to prevent the removal by fixing these RC bugs.
Last update: 2019-08-22
Standards version of the package is outdated.
The package should be updated to follow the last version of Debian Policy
(Standards-Version 4.4.0 instead of