Update cffi dependency to 1.15.0rc2 to fix issue with macOS arm (#196)

* Update cffi dependency to 1.15.0rc2 to fix issue with macOS arm

Author: berendkleinhaneveld

.github/workflows/ci.yml

@@ -98,7 +98,7 @@ jobs:
     - name: Install in development mode
       run: |
           python download-wgpu-native.py
-          python setup.py develop
+          pip install -e .
     - name: Test on repo
       run: |
           pytest -v tests

setup.py

@@ -28,7 +28,7 @@ def finalize_options(self):
 else:
     pass  # don't include binaries; user will have to arrange for the lib
 
-runtime_deps = ["cffi>=1.10", "rubicon-objc>=0.4.1; sys_platform == 'darwin'"]
+runtime_deps = ["cffi>=1.15.0rc2", "rubicon-objc>=0.4.1; sys_platform == 'darwin'"]
 
 
 setup(