Update CONTRIBUTING.md (#53)
Update CONTRIBUTING.md (#53)


GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils