add "@angular/cdk" dependencies

add "@angular/cdk" dependencies

Author: HuzzBuzz

package.json

@@ -13,6 +13,7 @@
   "private": true,
   "dependencies": {
     "@angular/animations": "^4.1.3",
+    "@angular/cdk": "^2.0.0-beta.8",
     "@angular/common": "^4.0.0",
     "@angular/compiler": "^4.0.0",
     "@angular/core": "^4.0.0",