refactor: update to Angular 7.1 (#170)

This PR bumps the versions of the Angular tooling dependencies. No changes in the code are needed.

Author: sis0k0

package-lock.json

@@ -15,9 +15,9 @@
   },
   "schematics": "./src/collection.json",
   "dependencies": {
-    "@angular-devkit/core": "~7.0.0",
-    "@angular-devkit/schematics": "~7.0.0",
-    "@schematics/angular": "~7.0.0"
+    "@angular-devkit/core": "~7.1.3",
+    "@angular-devkit/schematics": "~7.1.3",
+    "@schematics/angular": "~7.1.3"
   },
   "devDependencies": {
     "@types/jasmine": "^2.6.0",