Scikit-hep-testdata

Added a file with lots of STL collections inside STL collections, to fully map out the ways they should be deserialized.

Removed three large ROOT files to stay under the PyPI package size limit for now. (PR 34) This is not a good solution because these are useful files that we'll need to resurrect at some point, but for now I need a release that I can use for Uproot tests.

Several more test files (from `uproot`) added.

Several test files (from `uproot`) added.

* Use `import_resouces` to access data more reliably
* Fix YAML loading safety issues
* Use src layout
* Use setup.cfg and drop custom version/readme code
* Use PEP 517 builds if available
* Generate version from git tags, include in sdist/wheels
* Remove test / pytest runners from setup.py
* Loading Config file api uses class method instead of magic global
* Use GitHub Actions to make releases - universal wheel only

Fixing the attached metadata