build: fix e2e rate limit failures

* Since the `webdriver-manager` always tries to query the versions of all Selenium drivers, we currently run into rate limit failures that cause the E2E tests to not run properly.

Author: devversion

tools/gulp/tasks/e2e.ts

@@ -84,7 +84,10 @@ task(':watch:e2eapp', () => {
 });
 
 /** Ensures that protractor and webdriver are set up to run. */
-task(':test:protractor:setup', execNodeTask('protractor', 'webdriver-manager', ['update']));
+task(':test:protractor:setup', execNodeTask(
+  // Disable the Selenium standalone and gecko selenium drivers because otherwise the webdriver
+  // manager queries GitHub for the latest version and will result in rate limit failures.
+  'protractor', 'webdriver-manager', ['update', '--standalone', 'false', '--gecko', 'false']));
 
 /** Runs protractor tests (assumes that server is already running. */
 task(':test:protractor', execNodeTask('protractor', [PROTRACTOR_CONFIG_PATH]));