Update docs for minimum google-cloud-bigquery version.

Author: tswast

ci/requirements-3.6-0.20.1.conda

@@ -1,6 +1,6 @@
 google-auth
 google-auth-oauthlib
-google-cloud-bigquery==0.32.0
+google-cloud-bigquery==1.9.0
 pytest
 pytest-cov
 codecov

docs/source/changelog.rst

@@ -1,6 +1,24 @@
 Changelog
 =========
 
+.. _changelog-0.10.0:
+
+0.10.0 / TBD
+------------
+
+Dependency updates
+~~~~~~~~~~~~~~~~~~
+
+- Update the minimum version of ``google-cloud-bigquery`` to 1.9.0.
+  (:issue:`247`)
+
+Internal changes
+~~~~~~~~~~~~~~~~
+
+- Use ``to_dataframe()`` from ``google-cloud-bigquery`` in the ``read_gbq()``
+  function. (:issue:`247`)
+
+
 .. _changelog-0.9.0:
 
 0.9.0 / 2019-01-11

pandas_gbq/gbq.py

@@ -35,7 +35,7 @@ def _check_google_client_version():
         raise ImportError("Could not import pkg_resources (setuptools).")
 
     # https://github.com/GoogleCloudPlatform/google-cloud-python/blob/master/bigquery/CHANGELOG.md
-    bigquery_minimum_version = pkg_resources.parse_version("0.32.0")
+    bigquery_minimum_version = pkg_resources.parse_version("1.9.0")
     BIGQUERY_INSTALLED_VERSION = pkg_resources.get_distribution(
         "google-cloud-bigquery"
     ).parsed_version