Tests: Changed "npm start" to "npm run dev-test"

test/unit/README.md

@@ -12,4 +12,4 @@
 You can run the unit tests in two environments:
 
 - Node.js: Execute `npm run test`
-- Browser: Execute `npm start` and call `http://localhost:8080/test/unit/UnitTests.html` (see [How to run things locally](https://threejs.org/docs/#manual/introduction/How-to-run-things-locally))
+- Browser: Execute `npm run dev-test` and call `http://localhost:8080/test/unit/UnitTests.html` (see [How to run things locally](https://threejs.org/docs/#manual/introduction/How-to-run-things-locally))