Use local dict instead of modifying `locals()`

Introduce a new page for release notes
Extend the `filter()` documentation slightly
Implement the '~' merge operation
Support escaping `|` and `&` in `utils.filter()`
Accept additional rules in the `adjust()` call (#230)
Avoid `copy()` calls in `adjust()`
Directive `select` to control node selection
Allow filtering based on the node name
Drop epel-8
Fix github action
Remove travis.yaml
Turn schema validation method into a stand-alone function
Limit number of tests run for integration with tmt (#225)
Add a `Toolbelt Catalog` entry for `fmf`

Allow case-insensitive context matching
Move the copr repository to the `teemtee` group
Fix missing file require for unit tests
Add callback to adjust() to make it observable by callers
Drop support for `el-8` and `python-3.6`
Fix docs building on readthedocs
Install `yq` needed for `tmt` integration tests
Include `srpm_build_deps` in the packit config
Remove `metadata` from Packit config
Add missing build job to Packit config
Update pre-commit checks to the latest versions
Require `fmf` in tests, remove obsolete coverage
Fix a typo in the merging minus sign documentation

Retry if shallow clone fails

Shallow git clone if no reference is used
Select by the source of object
Enable the flake8 check, fix detected issues
Make when in adjust optional, add true|false expr.
Version as fmf flag and module attribute