Version 0.5.6 Release and Crash Fix

Hello again everyone!

Got another game patch here, this one should fix a potential crash when using the wizard's homing attack. Apologies to anyone who downloaded a version before this one, but you'll almost definitely have to redownload the game if you want to reliably use the wizard character.

Funny story about this crash, I've had to fix it three separate times now, and each time it went away for quite a while. It seems updating Godot to the latest version brought it back again. 

While patching the crash I took a look at improving the general functionality of the attack, and it will now automatically target another enemy again should the first target die before it can get there.

V0.5.6 changes include:

• fixed a crash when using wizard homing attack
• added retargeting to wizard homing attack for when the initial target dies

Figured I'd give you guys an idea of some stuff I'm working on. I've been looking into porting the game to html so it can be played in the browser, but the game's got some minor issues when configured for such. Gonna try to sort those out over the next few days and get it working.