Prior to this change we used the default session while downloading the
latest tags API response from Thunder. This left open the possibility that
NSURLSession could cache the response, even though the server asked it
not to; NSURLSession can be pretty aggressive about its caching.
This change ensure no caching of the API is occurring my using an
ephemeral session when calling the tags API.
Prior to this change the macOS HQ Launcher used the version from the
settings files. Pull this information in the settings file could
result in a situation where the setting file was updated, but interface
wasn't. When the launcher ran a second time it would check the settings
file and think Interface was updated even though it wasn't. This change
resolves the issue by asking interface for its version directly.
In the event that Interface doesn't response with a version number HQ
Launcher knows how to interoperate HQ Launcher will fall back to using the
settings file.
Known Issues
---
1) Interface reports different version number formats depending
on how its built. A stable interface for getting the build version
from interface should be added.
This change pins HQ Launcher's target SDK to 10.9, which is the same as
the target SDK for Interface. Without this pinned value the target
version defaults to whatever the OS version is on the machine that
happened to build HQ Launcher.
Priot to this change there was code that attempted to verify that
LAUNCHER_HMAC_SECRET was set to something. This code was broke though
and didn't catch the case correctly. This change fixes the check.
