higan v106 r1

多機種模擬器 higan 發布新版，更新如下 :

Changelog:

  - Z80: infinite DD/FD prefixes will no longer cause an emulator crash;
    but will still deadlock savestates
  - Z80: emulated R incrementing on M1 cycles
  - Z80: `LD a, [ir]` should update flags [hex_usr]
  - Z80: minor code cleanups
  - tomoko: added “Pause Emulation” toggle to Tools menu
      - you can still use the hotkey to pause emulation before starting
        a game if you really want to
      - this will be useful if and when I re-add trace logging to
        capture instructions from power-on
  - icarus: more PAL games added to the SNES database

I hope I've implemented R correctly. It should only increment twice on
DD,FD CB xx instructions. LDI/LDD/LDIR/LDDR should work as expected as
well. It increments once when interrupts are executed (and not maksed.)
The top bit is ignored in increments.

https://gitlab.com/higan/higan