message: Switch tf_upgrade_v2 target to python_version = "PY3" instead of python_version
  = "PY2".
diff: @@ -138,7 +138,7 @@ py_binary(
  name = "tf_upgrade_v2",
  srcs = ["tf_upgrade_v2_main.py"],
  main = "tf_upgrade_v2_main.py",
  - python_version = "PY2",
  + python_version = "PY3",
  srcs_version = "PY2AND3",
  deps = [
  ":ast_edits",
  