Change macOS deployment target in setup.py

Update macOS deployment target from 10.9 to 11.0.

Author: michaeltryby

swmm-toolkit/setup.py

@@ -88,7 +88,7 @@ def run(self):
     cmake_args = ["-GVisual Studio 17 2022","-Ax64"]
 
 elif platform_system == "Darwin":
-    cmake_args = ["-GNinja","-DCMAKE_OSX_DEPLOYMENT_TARGET:STRING=10.9"]
+    cmake_args = ["-GNinja","-DCMAKE_OSX_DEPLOYMENT_TARGET:STRING=11.0"]
 
 else:
     cmake_args = ["-GUnix Makefiles"]