Adapt Python bindings

Author: ruberith

setup.py

@@ -102,10 +102,18 @@ def build_extension(self, ext):
     long_description = f.read()
 
 # read version	
-f = open("version", "r")
+f = open("version.txt", "r")
 pbd_version = f.readline().strip()
 f.close() 
 
+max_numpy_version = "1.19.3"
+install_requires = [f"numpy<={max_numpy_version}"]
+if platform.machine() == "arm64":
+    if platform.system() == "Darwin":
+        install_requires = ["numpy>=1.21.0"]
+    else:
+        install_requires = [f"numpy>=1.19.0,<={max_numpy_version}"]
+
 setup(
     name=name,
     version=pbd_version,
@@ -121,5 +129,5 @@ def build_extension(self, ext):
     cmdclass=dict(build_ext=CMakeBuild),
     packages=find_packages(),
     zip_safe=False,
-    install_requires=['numpy<=1.19.3']
+    install_requires=install_requires
 )