Imports
- google.golang.org/api/iterator
- cloud.google.com/go/spanner
- cloud.google.com/go/spanner/admin/database/apiv1
- google.golang.org/genproto/googleapis/spanner/admin/database/v1
- github.com/golang-migrate/migrate/v4
- github.com/golang-migrate/migrate/v4/database
- github.com/hashicorp/go-multierror
- golang.org/x/net/context