This is a key piece of the ongoing `PUBLISH` _config.yml_ migration. There was uneven implementation of which YAML parser to use, and that could lead to bugs where one parser might read a value one way, and a different parser will read the value a different way. I wanted to be sure that YAML 1.2 would always work.
This makes all code that handles config files use the same `ruamel.yaml` parsers. This only touches other usages of YAML parsers when there is overlap. This does not port all of _fdroidserver_ to `ruamel.yaml` and YAML 1.2. The metadata files should already be YAML 1.2 anyway.
# Conflicts:
# fdroidserver/lint.py
This name always confuses me, since there is also test_common.py. And this
module is not actually a test suite, even though it starts with "test".
This also makes for better tab completion, e.g.
python3 -m unittest tests/te[Tab] -> tests/test_
