Fix typos in comments

When generating number of days macOS is out of date, filter out non-O…

…S items from AppleUpdateHistory.plist

Bump version for future release

When rejecting an item due to failed installable_condition, include t…

…he actual item version in the warning message

Bump version for upcoming release

Bump version(s) for future release

Port fix/workaround for Tahoe Background Security Improvements in Man…

…aged Software Center

Bump version for future release

Move a preference check to a higher-level function

Update needed source files for installhelper