chore: update README

Author: Ankit098

README.md

@@ -10,9 +10,8 @@
 * Update `*.conf.json` files inside the `config/` directory with your [BrowserStack Username and Access Key](https://www.browserstack.com/accounts/settings)
 
 ## Running your tests
-* To run a single test, run `composer single`
+* To run tests, run `composer test`
 * To run local tests, run `composer local`
-* To run parallel tests, run `composer parallel`
 
  Understand how many parallel sessions you need by using our [Parallel Test Calculator](https://www.browserstack.com/automate/parallel-calculator?ref=github)