OutlineFilter: this.uniforms.pixelWidth.value === null

[qt-pixels]

I've just tried to use this and I noticed the this.uniforms.pixelWidth.value === null
at the point of time it is trying to mutate the value property.

Locally I have set the object up with a dummy value so it can at least process and it seems to be working fine.

Impacted Lines 69 and 78