Update PyPI "project_urls"

Author: mdmintz

setup.py

@@ -68,13 +68,15 @@
     url='https://github.com/seleniumbase/SeleniumBase',
     project_urls={
         "Documentation": "https://seleniumbase.io/",
-        "Source Code": "https://github.com/seleniumbase/SeleniumBase",
+        "Source": "https://github.com/seleniumbase/SeleniumBase",
         "Changelog": "https://github.com/seleniumbase/SeleniumBase/releases",
         "Tracker": "https://github.com/seleniumbase/SeleniumBase/issues",
         "Gitter": "https://gitter.im/seleniumbase/SeleniumBase",
         "Slack": "https://app.slack.com/client/T0ABCRTNX/C01SM888REZ",
+        "Twitter": "https://twitter.com/SeleniumBase",
         "Blog": "https://seleniumbase.com/",
         "PyPI": "https://pypi.org/project/seleniumbase/",
+        "Download": "https://pypi.org/project/seleniumbase/#files",
     },
     platforms=["Windows", "Linux", "Mac OS-X"],
     author='Michael Mintz',