chore(package): update cssnano to version 4.0.0 (#2310)
chore(package): update cssnano to version 4.0.0 (#2310)


JohnnyQQQQ/angular-seed-material2,hookom/climbontheway,hookom/climbontheway,JohnnyQQQQ/angular-seed-material2,vyakymenko/angular-seed-express,hookom/climbontheway,mgechev/angular-seed,JohnnyQQQQ/angular-seed-material2,mgechev/angular2-seed,hookom/climbontheway,mgechev/angular-seed,mgechev/angular2-seed,mgechev/angular2-seed,vyakymenko/angular-seed-express,mgechev/angular-seed,vyakymenko/angular-seed-express