Add workaround for Pypy and reenable pypy wheel build

Author: viblo

CHANGELOG.rst

@@ -2,6 +2,10 @@
 Changelog 
 =========
 
+.. Pymunk 6.11.0???
+  Changes:
+  - Support pyglet 2.1.x (this means Pyglet 2.0.x wont work )
+  - Added back Pypy wheels with a workaround since it takes such a long for new Pypy version to come out.
 
 Pymunk 6.10.0 (2024-12-22)
 --------------------------

pyproject.toml

@@ -1,6 +1,7 @@
 [build-system]
 requires = [
     "setuptools",
+    "setuptools<74; platform_system=='Windows' and implementation_name=='pypy'",
     "wheel",
     "cffi >= 1.17.1; platform_system != 'Emscripten'",
     "cffi > 1.14.0; platform_system == 'Emscripten'",