Do not use skinview3d namespace in test.ts

The functions we need to test may not be exported by ../src/skinview3d

test/test.ts

@@ -1,7 +1,7 @@
 /// <reference path="shims.d.ts"/>
 
 import { expect } from "chai";
-import * as skinview3d from "../src/skinview3d";
+import { isSlimSkin } from "../src/utils";
 
 import skin1_8Default from "./textures/skin-1.8-default-no_hd.png";
 import skin1_8Slim from "./textures/skin-1.8-slim-no_hd.png";
@@ -13,21 +13,21 @@ describe("detect model of texture", () => {
 		const image = document.createElement("img");
 		image.src = skin1_8Default;
 		await Promise.resolve();
-		expect(skinview3d.isSlimSkin(image)).to.equal(false);
+		expect(isSlimSkin(image)).to.equal(false);
 	});
 
 	it("1.8 slim", async () => {
 		const image = document.createElement("img");
 		image.src = skin1_8Slim;
 		await Promise.resolve();
-		expect(skinview3d.isSlimSkin(image)).to.equal(true);
+		expect(isSlimSkin(image)).to.equal(true);
 	});
 
 	it("old default", async () => {
 		const image = document.createElement("img");
 		image.src = skinOldDefault;
 		await Promise.resolve();
-		expect(skinview3d.isSlimSkin(image)).to.equal(false);
+		expect(isSlimSkin(image)).to.equal(false);
 	});
 
 	/* TODO: implement transparent hat check for 64x32 skins