Log Message:
libretro-beetle-ngp: Update to 20200518

Garrett Brown (1):
      Fix compiler error due to missing assert.h include

f21red (1):
      backport 1.23.0-UNSTABLE core fixes

orbea (1):
      Fix clang build with casts.

retro-wertz (2):
      Fix #54
      Change name to Beetle NeoPop, add .npc extension

stellarporter (5):
      upstream bugfix
      HLE emulate VECT_FLASHERS
      TLCS900: relative PC-displacement fix
      Ogre Battle Gaiden - DAC speech hack
      Android: LOAD_FROM_MEMORY

trinemark (2):
      new irq handler
      Makefile: remove unneeded disassembler files

trioan (5):
      backport compiler fix
      backport cpu fix
      backport variable color depth
      misc cleanup
      fix loadstate audio popping

tryal-star (1):
      do not restart core if language changes

twinaphex (10):
      Add bitmask input code
      Get rid of asserts
      Update core options
      Updates
      (MSVC 2017) Buildfix
      Free surf->pixels in retro_unload_game
      Prepare variable sound rate
      Backport variable sound rate
      Update
      Silence warnings