fix: sway/wlroots version strings

[colemickens]

[bandithedoge]

This still needs to be fixed as it can break other packages like river which refuses to build with wlroots <0.15. You can use an overlay as a temporary workaround like so:

nixpkgs = {
	overlays = [
		(self: super: {
			wlroots = super.wlroots.overrideAttrs (_: {
				version = "0.15";
			});
		})
	];
};