Move away from dependency pinning anyway

It's a bit hard to decide. I have repeatedly changed this in the past.
New approach:
* Comment out pinning in pyproject.toml to speed up installation with
build isolation, and to retain default compatibility with older pythons
* Keep pinning ctypesgen in the workflow, but don't pin wheel anymore

.github/workflows/release.yaml

@@ -39,8 +39,7 @@ jobs:
       - name: Install/update dependencies
         run: |
           python3 -m pip install -U pip
-          python3 -m pip install -U setuptools setuptools-scm build
-          python3 -m pip install --force-reinstall git+https://github.com/pypa/wheel.git@9d4264d2f23ea44dd85639a27fa6b284261921cd
+          python3 -m pip install -U setuptools setuptools-scm build wheel
           python3 -m pip install git+https://github.com/ctypesgen/ctypesgen.git@master
           python3 -m pip install -U .[utilities,test,inserttext,converters]
       

pyproject.toml

@@ -7,6 +7,6 @@ requires = [
     "setuptools",
     "setuptools-scm",
     "build",
-    "wheel @ git+https://github.com/pypa/wheel.git@9d4264d2f23ea44dd85639a27fa6b284261921cd",  # or @main
-    "ctypesgen @ git+https://github.com/ctypesgen/ctypesgen.git@master",
+    "wheel",  # @ git+https://github.com/pypa/wheel.git@9d4264d2f23ea44dd85639a27fa6b284261921cd  # or @main
+    "ctypesgen",  # @ git+https://github.com/ctypesgen/ctypesgen.git@master
 ]