Tag v0.3.0
Account for mismatch between /browsers and /workers in BrowserStack API v3

* fixWorker: update props
* Check for worker.browser.os instead of worker.browser.browser since mobile wont have that
* fixWorker: Fill null values for worker properties missing in /workers from /browsers
* handleBrowser: Exclude worker.browser property from index due to upstream bug

Fixes #41.