alpha 0.5.10 for macOS

Last one of the three. 0.5.10 fixes the last remaining major issues. This one also improves the handling of individual threads on macOS by using the appropriate Mach interface.

I will take a little more time for 0.6.0 in order to give it the necessary testing on all platforms. Among other things I will look into cleaning up synchronization between the debugger and the OS interfaces (in cases where cleaning up is actually necessary). 0.6.0 will also be available on all platforms at the same time again.

Changelog for 00.05.10

• [macOS] Inject a debugger owned thread into the debuggee to execute code instead of hijacking debuggee threads
• [macOS] Changed the thread handling code to use the correct Mach exception port mechanism
• [macOS/Linux] Fixed an issue in SysV call generation that would not
  correctly reset the stack pointer after the call making it impossible to execute any expression after that call
• [DWARF] Fixed a regression that would leak one memory allocation when unloading DWARF debug information