stabilization of v0.1.65

[Marcus Burghardt]

Hello all,

The release of Content version 0.1.65 is scheduled for December 2nd.
As part of the release process, a stabilization branch was created.
Issues and PRs that were not solved were moved to the 0.1.66 milestone.

Any bug fixes you would like to include in release 0.1.65 should be proposed
for the *stabilization-v0.1.65* and *master* branches as a measure to avoid
potential conflicts between these branches.

The next version, 0.1.66, is scheduled to be released on February 3rd,
with the stabilization phase starting on January 23th, 2022.

Best regards,