bump: version to 0.3.0

Code cleanup (#10)

Ran code formatter
Reordered functions
Renamed functions to match what they actually do
Added create_receiver_dropdown to make code consistent

- Ran code formatter on main.rs (#6)

- Updated eframe version
- Added the following dependencies
1) fast_config
2) serde
3) dirs
- Added loading/saving a config file in your OS's user config folder using dirs::config_dir (https://docs.rs/dirs/latest/dirs/fn.config_dir.html)
- Added loading and saving devices, disabled states and rules
- Updated/Improved how the combo boxes show which device is selected (before it used an index and if you plugged a new device in, it could show the incorrect selected device, now we match it based on vender, product and serial numbers)
- Broke some code out into functions to allow reuse

- try out actions-rust-cross (#5)

* - try out actions-rust-cross
* - removed linux only commands
* - updated matrix
* - updated target for linux build
* - added artifact uploading
* - added changed shell for preping release
* - added pdb files to the exclude list for the artifact
* - updated action versions to prevent warnings on the summary page
* - instead of making a tar.gz just zip the binary