- update to 3.5.0:
* Close files opened by Scanner, Loader
* loader: Validate section keys
* loader: Improve tests and logging
* loader: Handle note files missing top-level keys
* Moving to OFTC
* [community goal] Update contributor documentation
* setup.cfg: Replace dashes with underscores
* Handle repositories with a default branch other than master
* Use py3 as the default runtime for tox
* Deny creating subdirectories
* drop lower-constraints
* fix: order tags to be sure to favor release tag over pre-release tags
* raise the minimum version of pyyaml
* add \`semver-next\` command
* add release note for \`encoding\` option
* [trivial] Use opendev url for source code link
* Add config option to set default character encoding
* Some cleanups
* Switch to newer openstackdocstheme version