Bug: 0.13.3 rejects all targets and no longer publishes

[jan-auer]

Version 0.13.3 no longer publishes any package with the following message.

CRAFT_LOG=debug craft publish 8.0.0
ℹ info craft 0.13.3
ℹ info "craft" version is compatible with the minimal version from the configuration file.
ℹ info Publishing version: "8.0.0"
ℹ info Using "GithubStatusProvider" for status checks
ℹ info Using "GithubArtifactProvider" for artifacts
ℹ info No config provided for Github status provider, calculating the combined status...
ℹ info Revision 4b8e22baaa35414ad48ddc872bbd2a565a952c86 has been built successfully.
⚠ warn No valid targets detected! Exiting.

I believe the culprit to be in #137