v0.5.0

This version adds support for nullable parameters and responses.

Change log

• [Breaking #8]: Add support for nullable parameters. This changes some operations to accept Option<T> instead of T, e.g. Vessel::flight() accepts an optional reference frame.
• [Breaking #10]: Nullable responses are now also Option<T>, e.g. KerbalAlarmClock::alarm_with_name() returns an optional alarm.

Full Changelog: https://github.com/kladd/krpc-client/commits/v0.5.0-0.5.2