Update SpiceDB API

[ssepml]

Description

This PR includes two changes:

• Updated the SpiceDB API spec to the latest one which includes support to:
  • Cursors
  • Bulk import / export of relationships
• Update protobuf to 0.12.0 and updated tests to remove the use of new method as it is now deprecated (see error below)

warning: Authzed.Api.V1.WriteSchemaRequest.new/1 is deprecated. Build the struct by hand with %MyMessage{...} or use struct/2
  test/authzed_test.exs:56: AuthzedTest."test basic operation"/1

[goodhamgupta]

Thanks for the PR @ssepml! 😄 Since the API has changed now, I think it would be best to also bump up the version of the package(from 0.0.3 to 0.0.4), to avoid breaking changes for people already using the 0.0.3 version.

[ssepml]

Since the API has changed now, I think it would be best to also bump up the version of the package(from 0.0.3 to 0.0.4), to avoid breaking changes for people already using the 0.0.3 version.

Of course, done. And thanks a lot for the quick response 😄

[goodhamgupta]

LGTM 🚀 Thank you!