feat: switch from setup.cfg to pyproject.toml + hatchling

tasks.py

@@ -30,22 +30,17 @@ import shutil
 from invoke import task
 
 
-here = os.path.abspath(os.path.dirname(__file__))
-exec(open(os.path.join(here, 'rattail_nationbuilder', '_version.py')).read())
-
-
 @task
 def release(c):
     """
     Release a new version of rattail-nationbuilder
     """
-    # rebuild local tar.gz file for distribution
+    # rebuild package
+    if os.path.exists('dist'):
+        shutil.rmtree('dist')
     if os.path.exists('rattail_nationbuilder.egg-info'):
         shutil.rmtree('rattail_nationbuilder.egg-info')
     c.run('python -m build --sdist')
 
-    # filename of built package
-    filename = f'rattail_nationbuilder-{__version__}.tar.gz'
-
     # upload to PyPI
-    c.run('twine upload dist/{}'.format(filename))
+    c.run('twine upload dist/*')