Fixed use of Object.assign (doesn't work on IE11)
Fixed use of Object.assign (doesn't work on IE11)

photonstorm/phaser,TukekeSoft/phaser,photonstorm/phaser,BeanSeed/phaser,TukekeSoft/phaser,spayton/phaser,TukekeSoft/phaser,spayton/phaser,mahill/phaser,mahill/phaser,pixelpicosean/phaser,englercj/phaser,rblopes/phaser,BeanSeed/phaser