What's Changed
* Expand TestAllTypes to allow removal of internal testing proto. https://github.com/google/cel-spec/pull/376
* Add initial conformance tests for cel.block. https://github.com/google/cel-spec/pull/377
* Update block_ext.textproto for recent CSE modifications. https://github.com/google/cel-spec/pull/380
* Add nested groups to proto2 and optional fields to proto3 test protos https://github.com/google/cel-spec/pull/382
* Add a default expr target https://github.com/google/cel-spec/pull/379
* Update go package references and artifacts on cel-spec https://github.com/google/cel-spec/pull/384
New Contributors
* aaomidi made their first contribution in https://github.com/google/cel-spec/pull/379
**Full Changelog**: https://github.com/google/cel-spec/compare/v0.16.0...v0.16.1