* opt: using google/cloud-storage. close Superbalist/flysystem-google-cloud-storage#74

* fixbug: there is no Google\Cloud\Exception but Google\Cloud\Core\Exception Superbalist/flysystem-google-cloud-storage#74

* fixbug: ci should remove google cloud Superbalist/flysystem-google-cloud-storage#74

* opt: support google/cloud-storage 1.0 Superbalist/flysystem-google-cloud-storage#74

* fixbug: styleci bad link

* fixbug: variable name error

* safer: limit require version Superbalist/flysystem-google-cloud-storage#74

* Bring back StyleCI #26