feat: Support PyArrow versions 3.0.0 through 9

Author: willsthompson

setup.py

@@ -85,7 +85,7 @@ def readme():
         "google-auth>=1.25.0,<3.0.0dev",  # Work around pip wack.
         "google-cloud-bigquery>=2.25.2,<4.0.0dev",
         "google-cloud-bigquery-storage>=2.0.0,<3.0.0dev",
-        "pyarrow>=3.0.0,<7.0dev",
+        "pyarrow>=3.0.0,<=9",
         # Temporarily set maximimum sqlalchemy to a known-working version while
         # we debug failing compliance tests. See:
         # https://github.com/googleapis/python-bigquery-sqlalchemy/issues/386