v13.0.0-rc.0

This release upgrades @angular/language-service to v13.0.0-rc.3.
For a complete change log see
here.

1. feat: provide snippets for attribute (#1509) (0428c31)
2. feat: Add support for going to template from component (#1491) (3014713)
3. feat(server): add related information to diagnostics (#1492) (04b215b)
4. feat: add config to enable auto-apply optional chaining on nullable symbol (#1469) (4fcbdb7)