Retrieves information on all Shared Workers. It returns an array of ShareWorkerInfo.
Example
const view = await fin.View.create({
name: 'viewName',
target: fin.me.identity,
bounds: {top: 10, left: 10, width: 200, height: 200}
});
await view.navigate('http://mdn.github.io/simple-shared-worker/index2.html');
const sharedWorkers = await view.getSharedWorkers();