[RenderPixi] Can't pass options for PIXI.WebGLRenderer

[hideyukisaito]

In case of working with high density displays like retina, we have to pass the "resolution" (and optionally "autoResize") option to PIXI.WebGLRenderer. But it seems we don't have ways to pass it, or any other option values described in PIXI's document.

https:/liabru/matter-js/blob/master/src/render/RenderPixi.js#L53-L58

I think there should be all option parameters filled with default values and we should be able to overwrite them by passing a "options" argument for RenderPixi.create().

Thanks!

[liabru]

You can now pass pixiOptions in your RenderPixi.create options (you could also pass a PIXI.WebGLRenderer instance in the options as renderer instead).

[hideyukisaito]

@liabru Cool!! Thanks for the fix!