webdriver-manager update command results in GitHub API rate limit

[Blackbaud-BobbyEarl]

Problem is described well angular/webdriver-manager#216. A few errors messages that are results of the problem (making this easier to search for in the future).

Error message: Could not find update-config.json. Run 'webdriver-manager update' to download binaries.

UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: Failed to make Github request, rate limit reached.

Generally, rerunning the build gives enough time so we're back within the threshold. We should investigate solutions to mitigate this. For example, possibly setting the --out_dir property when running webdriver-manager update, as suggested in the issue linked above.

[Blackbaud-BobbyEarl]

Fixed in 1.0.0-rc.18