Enrollment fails on Safari browser

[rentallect]

ziti-sdk-js uses the browser/web API Blob.text() in its rest-client impl used to do REST calls to the Controller. e.g. to call the /.well-known/est/cacerts endpoint during enrollment operations.

The text() method in the Blob interface returns a Promise that resolves with a string containing the contents of the blob, interpreted as UTF-8.

The problem is... Safari doesn't support Blob.text() 👎
(as shown here: https://developer.mozilla.org/en-US/docs/Web/API/Blob/text)

I need to refactor this area with an eye towards using web APIs supported by all of the big three browsers.