'ToolShedInstance' object has no attribute 'categories'

e.g. https://travis-ci.org/peterjc/galaxy_blast/jobs/223482368 (expand the final entry for post-success actions), using planemo-0.40.0-py2.py3-none-any.whl

```
$ planemo shed_update --shed_target testtoolshed --force_repository_creation --check_diff --shed_key_from_env TTS_KEY -r datatypes/ packages/ tools/ workflows/
fi

cd '/home/travis/build/peterjc/galaxy_blast/datatypes/blast_datatypes' && git rev-parse HEAD
cd '/home/travis/build/peterjc/galaxy_blast/datatypes/blast_datatypes' && git diff --quiet
Diffing repository [blast_datatypes]
wget -q -O - 'https://testtoolshed.g2.bx.psu.edu/repository/download?repository_id=f11cf06cdcc13cfd&changeset_revision=default&file_type=gz' | tar -xzf - -C /tmp/tool_shed_diff_3_ssRl/_testtoolshed_ --strip-components 1
mkdir "/tmp/tool_shed_diff_3_ssRl/_workingdir_"; tar -xzf "/tmp/tmpP70pNT" -C "/tmp/tool_shed_diff_3_ssRl/_workingdir_"; rm -rf /tmp/tmpP70pNT
cd "/tmp/tool_shed_diff_3_ssRl"; diff -r _workingdir_ _testtoolshed_
Repository [blast_datatypes] not different, skipping upload.
'ToolShedInstance' object has no attribute 'categories'
Repository contents updated but failed to update metadata for repository 'blast_datatypes' on the test Tool Shed.
...
```