* Bump for Xcode 11.3 beta 1
* [system-dependencies] Make it clearer what failed on the bots.
Locally we use colors to distinguish between warnings and failures, but colors
don't show up on the bots, so use text instead.
* Verbose provisioning.
* [system-dependencies] Improve simulator checks a bit.
* Non-verbose provisioning.
* We must bump the min simulator versions, since Apple has bumped what they offer.
* Re-enable simulator provisioning.
* Minor output fix to siminstaller to make the output easier to understand.
* Improve the behavior when we fail to download the .dvtdownloadableindex file
to report a "Not Found" if we get a "Forbidden" (403) response, since that's
what it really is.
* Improve the behavior when we fail to download the .dvtdownloadableindex file
to check if the requested simulators are already installed instead of always
failing. This makes it possible to manually install the required simulators
if needed (Apple might not have published simulators for the Xcode version
we're using), and this would allow any checks to pass if the required
simulators are already installed.
* Improve the code to modify the PackageInfo XML to not use simple string
replacement (it's too fragile), use proper XML parsing instead.
* Fix "time left" math, I have no idea what my previous math was doing.
Vincent Dondain
Rolf Bjarne Kvinge