Log Message:
py-pbr: updated to 5.11.0

5.11.0
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* Fix symbol identification in multiline message
* Replace deprecated readfp method with read\_file

5.10.0
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* Specify Changelog procedure
* Allow leading spaces when determining symbols
* Use stdlib importlib.metadata where possible
* Adding python classifiers py38 & py39

5.9.0
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* Future-proofing pyproject.toml
* Use importlib-metadata for runtime package version lookups
* Drop wheel from pyproject.toml examples
* Changed minversion in tox to 3.18.0