Merge pull request #9696 [BEAM-8324] Restrict the upper bound for dill due to incompatibility between versions 0.3.0 and 0.3.1.1.

Author: tvalentyn

sdks/python/setup.py

@@ -105,7 +105,8 @@ def get_version():
     'avro>=1.8.1,<2.0.0; python_version < "3.0"',
     'avro-python3>=1.8.1,<2.0.0; python_version >= "3.0"',
     'crcmod>=1.7,<2.0',
-    'dill>=0.2.9,<0.4.0',
+    # Dill doesn't guarantee comatibility between releases within minor version.
+    'dill>=0.3.0,<0.3.1',
     'fastavro>=0.21.4,<0.22',
     'funcsigs>=1.0.2,<2; python_version < "3.0"',
     'future>=0.16.0,<1.0.0',