Smpclient

Expose pyserial init parameters in `SMPSerialTransport` init.

**Full Changelog**: https://github.com/intercreate/smpclient/compare/0.1.1...0.2.0

Fixes Pydantic error on initialization of `SMPRequest`s and adds coverage.

**Full Changelog**: https://github.com/intercreate/smpclient/compare/0.1.0...0.1.1

Initial release

**Full Changelog**: https://github.com/intercreate/smpclient/commits/0.1.0