Update changelog for 1.2.4
Update changelog for 1.2.4

staabm/composer,andrerom/composer,alcohol/composer,nicolas-grekas/composer,slbmeh/composer,johnstevenson/composer,hirak/composer,stof/composer,localheinz/composer,floverdevel/composer,curry684/composer,remicollet/composer,composer/composer,SpacePossum/composer,fabiang/composer,stefangr/composer,jreinke/composer,pierredup/composer,MoT3rror/composer,dzuelke/composer,balbuf/composer,erasys/composer,naderman/composer,fabpot/composer,gencer/composer,till/composer,milleruk/composer,vdm-io/composer