Update README to reflect BigQuery and Spanner as GA (#813)
Update README to reflect BigQuery and Spanner as GA (#813)

* Update README to reflect BigQuery and Spanner as GA

* alphabetize beta services

googleapis/google-cloud-php,chingor13/google-cloud-php,jdpedrie/google-cloud-php,chingor13/google-cloud-php,googleapis/google-cloud-php,chingor13/google-cloud-php,googleapis/google-cloud-php,jdpedrie/google-cloud-php,jdpedrie/google-cloud-php