Ansys-api-additive

What's Changed
* Change 3D MS flag to bool by pkrull-ansys in https://github.com/ansys/ansys-api-additive/pull/32
* Remove InitialMicrostructureInput message by pkrull-ansys in https://github.com/ansys/ansys-api-additive/pull/33
* Add 3D microstructure input to simulation request message by pkrull-ansys in https://github.com/ansys/ansys-api-additive/pull/34
* Remove deposit layer thickness field from 3d microstructure request message by pkrull-ansys in https://github.com/ansys/ansys-api-additive/pull/35
* Expand range of acceptable protobuf versions by pkrull-ansys in https://github.com/ansys/ansys-api-additive/pull/36
* Update protobuf definitions by safeerehman in https://github.com/ansys/ansys-api-additive/pull/37


**Full Changelog**: https://github.com/ansys/ansys-api-additive/compare/v1.6.8...v1.7.0

* Expanded protobuf version range to <6.

**Full Changelog**: https://github.com/ansys/ansys-api-additive/compare/v1.6.7...v1.6.8

**Full Changelog**: https://github.com/ansys/ansys-api-additive/compare/v1.6.6...v1.6.7

**Full Changelog**: https://github.com/ansys/ansys-api-additive/compare/v1.6.5...v1.6.6

**Full Changelog**: https://github.com/ansys/ansys-api-additive/compare/v1.6.4...v1.6.5

**Full Changelog**: https://github.com/ansys/ansys-api-additive/compare/v1.6.3...v1.6.4