bump `chalk`
bump `chalk`

denisbabineau/grunt-contrib-uglify,devgrok/grunt-contrib-uglify,MarianVasile/grunt-contrib-uglify,cvibhagool/grunt-contrib-uglify,okonomiyaki3000/grunt-contrib-uglify,gruntjs/grunt-contrib-uglify,MoLow/grunt-contrib-uglify,reppners/grunt-contrib-uglify,tempbottle/grunt-contrib-uglify