chore(package): update @angular-devkit/schematics to version 8.3.5

Closes #82

Author: greenkeeper[bot]

demo/package.json

@@ -53,7 +53,7 @@
   "devDependencies": {
     "@angular-builders/jest": "^7.2.0",
     "@angular-devkit/build-angular": "^0.10.7",
-    "@angular-devkit/schematics": "^7.2.1",
+    "@angular-devkit/schematics": "^8.3.5",
     "@angular/cli": "^7.2.1",
     "@angular/compiler-cli": "^7.2.0",
     "@angular/language-service": "^7.2.0",