Move Three.Unit.js file inside test folder instead of src

rollup.unit.config.js

@@ -24,7 +24,7 @@ function glsl() {
 }
 
 export default {
-	entry: 'src/Three.Unit.js',
+	entry: 'test/Three.Unit.js',
 	indent: '\t',
 	plugins: [
 		glsl()

src/Three.Unit.js → test/Three.Unit.js

-import './polyfills.js';
+import '../src/polyfills.js';
 
 export * from './constants.js';
 export * from './Three.Legacy.js';