Release v6.27.4

[kstenerud]

Enhancements

• Free disk space is only sent on macOS, since the APIs to get it are now on the Apple grey list.
  1617

• Remove calls to stat, which is now an API on the Apple grey list.
  1614

• Add Privacy Manifest covering BugSnag data and API usage
  1616

[tomlongridge]

This should be 6.28.0 - given they are all classed as Enhancements

[github-actions]

Bugsnag.framework binary size decreased by 280 bytes from 713,488 to 713,208 🎉

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  +3.1%    +573  +3.1%    +573    [__TEXT]
  [ = ]       0  +3.8%    +280    [__LINKEDIT]
  +0.6%     +40  +0.3%     +40    [__DATA]
  -0.0%      -5  -0.0%      -5    __TEXT,__cstring
  -0.5%      -8  -0.5%      -8    Indirect Symbol Table
  -0.2%      -8  -0.2%      -8    Lazy Binding Info
  -0.6%      -8  -0.6%      -8    __DATA,__la_symbol_ptr
  -0.6%     -12  -0.6%     -12    __TEXT,__stub_helper
  -0.6%     -12  -0.6%     -12    __TEXT,__stubs
  -0.2%     -32  -0.2%     -32    __DATA,__cfstring
  -0.1%     -88  -0.1%     -88    String Table
  -0.1%    -176  -0.1%    -176    Symbol Table
  -0.2%    -544  -0.2%    -544    __TEXT,__text
  -0.0%    -280  [ = ]       0    TOTAL

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