chore(package.json): bump year in license
chore(package.json): bump year in license

* Bumps the year in the license (similar as in angular/angular)
benbraou/flex-layout,d3viant0ne/flex-layout,d3viant0ne/flex-layout,angular/flex-layout,brendanoffer/flex-layout,brendanoffer/flex-layout,atscott/flex-layout,angular/flex-layout,karlhaas/flex-layout,atscott/flex-layout,benbraou/flex-layout,d3viant0ne/flex-layout,angular/flex-layout,DevVersion/flex-layout,karlhaas/flex-layout,benbraou/flex-layout,brendanoffer/flex-layout,atscott/flex-layout,benbraou/flex-layout,DevVersion/flex-layout,angular/flex-layout,karlhaas/flex-layout,DevVersion/flex-layout,atscott/flex-layout