Moving stuff to pyproject.toml

- https://peps.python.org/pep-0621/
- https://setuptools.pypa.io/en/latest/userguide/pyproject_config.html

.github/workflows/wheels.yml

@@ -17,8 +17,8 @@ jobs:
 
       - name: Build sdist and wheel
         run: |
-          python -m pip install wheel setuptools
-          python setup.py sdist bdist_wheel
+          python -m pip install build
+          python -m build
 
       - uses: actions/upload-artifact@v3
         with:

.gitignore

@@ -1,2 +1,3 @@
 *__pycache__/
 /*.egg-info/
+/planck_2020_hillipop/_version.py

planck_2020_hillipop/__init__.py

@@ -1,5 +1,2 @@
-from ._version import get_versions
+from ._version import __version__
 from .hillipop import EE, TE, TT, TTTEEE
-
-__version__ = get_versions()["version"]
-del get_versions