chore(deps): pin ipython to v7.17.0 for samples, python >= 3.7 (#208)
chore(deps): pin ipython to v7.17.0 for samples, python >= 3.7 (#208)

Co-authored-by: Tres Seaver <0c654242ef00c3b4e79f8f8068911d86fe01854e@palladion.com>
Co-authored-by: Takashi Matsuo <f7c23db50f898cb58348f8ccc2931585dc97581a@google.com>
googleapis/python-bigquery,googleapis/python-bigquery