Removed 'Recursive constraint parameter is not allowed' error in haxe3
removed 'unused var' warning
Bumped version number to 1.2.0
Get Slot compiling with haxe 3 and haxe 2.10
Get Signal compiling with haxe 3 and 2.10
Update Slot.hx
Update Slot.hx
Upgraded dependencies
Added mtask dev dependency
Updated dependencies