Log Message:
tex-bookmark{,-doc}: update to 1.31

1.31
* Simplified the .dtx. It is no longer a self-extracting archive
  instead the newly added .ins should be used for installation.
* Removed the now outdated frozen drivers from 2019.
* Removed the dependency on ltxcmds.

1.30
* Corrected support for option bookmarkstype of hyperref
* Added support for structure destinations