Add rubygem-google-cloud-spanner-admin-instance-v1 0.1.3

API Client library for the Cloud Spanner Instance Admin V1 API

Cloud Spanner is a managed, mission-critical, globally consistent and scalable
relational database service.

WWW: https://github.com/googleapis/google-cloud-ruby
WWW: https://github.com/googleapis/google-cloud-ruby/tree/master/google-cloud-spanner-admin-instance-v1