chore(package): update rollup to version 0.52.0 (#2152)
chore(package): update rollup to version 0.52.0 (#2152)


christophersanson/js-demo-fe,JohnnyQQQQ/angular-seed-material2,mgechev/angular2-seed,dmitriyse/angular2-seed,dmitriyse/angular2-seed,mgechev/angular-seed,vyakymenko/angular-seed-express,pieczkus/whyblogfront,pieczkus/whyblogfront,mgechev/angular-seed,mgechev/angular-seed,hookom/climbontheway,mgechev/angular2-seed,JohnnyQQQQ/angular-seed-material2,christophersanson/js-demo-fe,JohnnyQQQQ/angular-seed-material2,hookom/climbontheway,dmitriyse/angular2-seed,hookom/climbontheway,vyakymenko/angular-seed-express,mgechev/angular2-seed,vyakymenko/angular-seed-express,christophersanson/js-demo-fe,hookom/climbontheway,pieczkus/whyblogfront,dmitriyse/angular2-seed