ci: verify before uploading, unpin setuptools

- Verify the build before it goes out. Previously, we missed that the README.md wouldn't be picked up on case-sensitive OS such as the one we use to deploy.
- Unpin setuptools to not stick with the deprecated source distribution name.

.github/workflows/pylake_release.yml

@@ -32,4 +32,5 @@ jobs:
         TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
       run: |
         python -m build
+        python -m twine check --strict dist/*
         python -m twine upload dist/* --verbose

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools<69.3", "wheel"]
+requires = ["setuptools", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -10,7 +10,7 @@ authors = [
     {name = "Lumicks B.V."},
     {email = "[email protected]"},
 ]
-readme = {file="README.md", content-type = "text/markdown"}
+readme = {file="readme.md", content-type = "text/markdown"}
 license = {file = "license.md"}
 keywords = ["optical tweezers", "kymographs", "data analysis", "lumicks"]
 classifiers=[