Create Dependabot config file (#235)
Create Dependabot config file (#235)

Co-authored-by: dependabot-preview[bot] <6a4c1c4838f800d1998274cd5234e1f65c55e90c@users.noreply.github.com>
GoogleCloudPlatform/google-cloud-spanner-hibernate,GoogleCloudPlatform/google-cloud-spanner-hibernate,GoogleCloudPlatform/google-cloud-spanner-hibernate