Update CHANGES for 0.2.1
Update CHANGES for 0.2.1

libretro/mgba,mgba-emu/mgba,jeremyherbert/mgba,cassos/mgba,libretro/mgba,iracigt/mgba,fr500/mgba,sergiobenrocha2/mgba,mgba-emu/mgba,bentley/mgba,Anty-Lemon/mgba,fr500/mgba,Iniquitatis/mgba,Iniquitatis/mgba,zerofalcon/mgba,zerofalcon/mgba,jeremyherbert/mgba,MerryMage/mgba,askotx/mgba,Touched/mgba,mgba-emu/mgba,sergiobenrocha2/mgba,sergiobenrocha2/mgba,fr500/mgba,askotx/mgba,MerryMage/mgba,matthewbauer/mgba,Iniquitatis/mgba,Anty-Lemon/mgba,AdmiralCurtiss/mgba,jeremyherbert/mgba,Anty-Lemon/mgba,matthewbauer/mgba,MerryMage/mgba,fr500/mgba,Anty-Lemon/mgba,AdmiralCurtiss/mgba,libretro/mgba,AdmiralCurtiss/mgba,Touched/mgba,iracigt/mgba,askotx/mgba,cassos/mgba,Touched/mgba,sergiobenrocha2/mgba,libretro/mgba,askotx/mgba,mgba-emu/mgba,iracigt/mgba,bentley/mgba,libretro/mgba,sergiobenrocha2/mgba,iracigt/mgba,Iniquitatis/mgba,cassos/mgba,jeremyherbert/mgba,zerofalcon/mgba