Bug Fixes
- core: allow Observable in validator message (2d6ddfa), closes #3601
- core: handle unchanged emitted model immutable mode (601ddd3), closes #3584
- kendo: update peer dependencies (#3592) (ecbbe55), closes #3571
- material: fix typo "ng-containe" -> "ng-container" (e262fbf)
- material: update assign DisplayWith in Slider type (e76e243), closes #3574
- material: use same reference for adding and removing event listener (22c2ec1)