[py] Bump to 4.0a3

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/SeleniumHQ/selenium
Cr-Mirrored-Commit: f2555adaa941b24e77e3107beb2544bf563bb12e
diff --git a/setup.py b/setup.py
index 85ebdff..f7cac22 100755
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
 setup_args = {
     'cmdclass': {'install': install},
     'name': 'selenium',
-    'version': "4.0.0a1",
+    'version': "4.0.0a3",
     'license': 'Apache 2.0',
     'description': 'Python bindings for Selenium',
     'long_description': open(join(abspath(dirname(__file__)), "README.rst")).read(),