chore(package): updated the deps of the demo app

Author: AnthonyNahas

demo/package.json

@@ -6,6 +6,7 @@
   "scripts": {
     "ng": "ng",
     "start": "ng serve",
+    "serve:prod": "ng serve --prod",
     "build": "ng build",
     "test": "jest",
     "lint": "ng lint",

demo/yarn.lock

@@ -101,9 +101,9 @@
   dependencies:
     tslib "^1.9.0"
 
-"@angular/cdk@^6.4.1":
-  version "6.4.1"
-  resolved "https://registry.yarnpkg.com/@angular/cdk/-/cdk-6.4.1.tgz#f03e4f628c019410b310a8a5238a655e2e134e82"
+"@angular/cdk@^6.4.2":
+  version "6.4.2"
+  resolved "https://registry.yarnpkg.com/@angular/cdk/-/cdk-6.4.2.tgz#e623cdbbe6258980b0fa93beafce0ea7c4e2c17b"
   dependencies:
     tslib "^1.7.1"
 
@@ -171,9 +171,9 @@
   version "6.1.0"
   resolved "https://registry.yarnpkg.com/@angular/language-service/-/language-service-6.1.0.tgz#3c73ee95acb5d1b74319d81b01e02701bbd1f539"
 
-"@angular/material@^6.4.1":
-  version "6.4.1"
-  resolved "https://registry.yarnpkg.com/@angular/material/-/material-6.4.1.tgz#f9849e19bf2e339c5fbd78b6e72287b770268423"
+"@angular/material@^6.4.2":
+  version "6.4.2"
+  resolved "https://registry.yarnpkg.com/@angular/material/-/material-6.4.2.tgz#f39529d56bad97f0470b886c3f30591b9d3a7d05"
   dependencies:
     tslib "^1.7.1"
   optionalDependencies: