Revert "chore: yarn upgrade"
Revert "chore: yarn upgrade"

This reverts commit 92f1b3b74f24f654b7bf7580d603a35ace87314f.

mattlewis92/angular-calendar,mattlewis92/angular2-calendar,mattlewis92/angular2-calendar,mattlewis92/angular-calendar,mattlewis92/angular-calendar,mattlewis92/angular-calendar,mattlewis92/angular2-calendar