zero width space markers and base64 encoded data in sgf files are probably terrible ideas

setup.py

@@ -42,6 +42,7 @@ setup(
         "wheel",
         "setuptools",
         "urllib3",
+        "bson",
         "importlib_resources ;python_version<'3.7'",
         "cython>=0.24,<=0.29.14,!=0.27,!=0.27.2",  # kivy wants this
         "kivy==2.0.0rc2;platform_system=='Darwin'",  # rc3 failing on mac