KOJIMA Kazunori

closes #42 ## Task ### Deprecated CreateFunc * [x] resourceMackerelChannelCreate * [ ] resourceMackerelServiceMonitorCreate * [ ] resourceMackerelServiceCreate * [ ] resourceMackerelHostMonitorCreate * [ ] resourceMackerelExternalMonitorCreate * [ ] resourceMackerelExpressionMonitorCreate...

* [Upgrade Guide](https://www.terraform.io/docs/extend/guides/v2-upgrade-guide.html)

https://www.terraform.io/docs/registry/providers/docs.html

## API Reference https://mackerel.io/ja/api-docs/entry/notification-groups#create

Currently, only support legacy dashboard. ## API Reference https://mackerel.io/ja/api-docs/entry/dashboards#create

https://mackerel.io/ja/api-docs/entry/aws-integration#create

The restored Glacier object has been excluded from loading because the storage class remains Glacier. This fix will load the Glacier object if it has already been restored. * Restored...