Merge pull request #20624 from alexpreynolds/materialparameters-interface-patch

TS: Add userData to MaterialParameters.

src/materials/Material.d.ts

@@ -53,6 +53,7 @@ export interface MaterialParameters {
 	stencilFail?: StencilOp;
 	stencilZFail?: StencilOp;
 	stencilZPass?: StencilOp;
+	userData?: any;
 }
 
 /**