Update package.json

package.json

@@ -8,6 +8,7 @@
     "@angular/common": "5.2.11",
     "@angular/compiler": "5.2.11",
     "@angular/core": "5.2.11",
+    "@angular/flex-layout": "2.0.0-beta.12",
     "@angular/forms": "5.2.11",
     "@angular/http": "5.2.11",
     "@angular/material": "^5.0.2",