Proto-plus-stubs

What's Changed
* Make field types more restrictive by henribru in https://github.com/henribru/proto-plus-stubs/pull/12
* Support string as first field argument by henribru in https://github.com/henribru/proto-plus-stubs/pull/13


**Full Changelog**: https://github.com/henribru/proto-plus-stubs/compare/v0.6.1...v0.7.0

What's Changed
* Fix Timestamp fields not returning DatetimeWithNanoseconds by henribru in https://github.com/henribru/proto-plus-stubs/pull/11


**Full Changelog**: https://github.com/henribru/proto-plus-stubs/compare/v0.6.0...v0.6.1

What's Changed
* Modernize types by henribru in https://github.com/henribru/proto-plus-stubs/pull/7
* Fix incorrect message annotations by henribru in https://github.com/henribru/proto-plus-stubs/pull/8
* Use abstract return type for repeated and map fields by henribru in https://github.com/henribru/proto-plus-stubs/pull/9


**Full Changelog**: https://github.com/henribru/proto-plus-stubs/compare/v0.5.0...v0.6.0

What's Changed
* Add defaults by henribru in https://github.com/henribru/proto-plus-stubs/pull/6


**Full Changelog**: https://github.com/henribru/proto-plus-stubs/compare/v0.4.0...v0.5.0

What's Changed
* Extract integer type by henribru in https://github.com/henribru/proto-plus-stubs/pull/4
* Improve descriptor type by henribru in https://github.com/henribru/proto-plus-stubs/pull/5


**Full Changelog**: https://github.com/henribru/proto-plus-stubs/compare/v0.3.1...v0.4.0

What's Changed
* Add private _pb Message field by henribru in https://github.com/henribru/proto-plus-stubs/pull/3


**Full Changelog**: https://github.com/henribru/proto-plus-stubs/compare/v0.3.0...v0.3.1