Pinned VTK version and added other OSes to the VTK build workflow

Author: jmwright

.github/workflows/build-vtk.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ 'ubuntu-20.04' ]
+        os: [ 'ubuntu-20.04', 'macos-11', 'windows-2019' ]
         python-version: [ '3.9', '3.10', '3.11', '3.12' ]
 
     steps:

setup.py

@@ -394,7 +394,7 @@ def try_unmangle(n):
         "Topic :: Software Development :: Libraries :: Python Modules",
         "Topic :: Scientific/Engineering"
     ],
-    install_requires=["vtk"],
+    install_requires=["vtk==9.2.6"],
     # Dummy extension to trigger build_ext
     ext_modules=[Extension("__dummy__", sources=[])],
     cmdclass={"bdist_wheel": bdist_wheel_repaired, "build_ext": copy_installed},