Correctly read Dash character (-) keybind from settings file

[parracodea]

In game, you can set - as a keybind and it'll work fine. After exiting the game, the keybindings.json file has the keybind with - stored correctly. However when re-launching the game, the keybind is no longer assigned.

In EmptyEpsilon.log, there is a log message saying that the - character didn't get parsed correctly from the keybindings.json file. Note that there's no space (or any character) after the colon.

[INFO    ]: Starting...
[INFO    ]: Crash Reporter ON
[INFO    ]: Using . as configuration path
[INFO    ]: Loaded: packs/Angryfly.pack with 166 files
[INFO    ]: Loaded: packs/Asteroids.pack with 30 files
[INFO    ]: Loaded: packs/msgamedev.pack with 96 files
[WARNING ]: Unknown key binding:
[INFO    ]: Loading treegui/default.theme.txt