Bump @angular-devkit/build-angular from 0.13.5 to 0.13.6

Bumps [@angular-devkit/build-angular](https://github.com/angular/angular-cli) from 0.13.5 to 0.13.6.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Commits](https://github.com/angular/angular-cli/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

package-lock.json

@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "@angular-devkit/architect": "^0.13.4",
-    "@angular-devkit/build-angular": "~0.13.5",
+    "@angular-devkit/build-angular": "~0.13.6",
     "@angular-devkit/core": "^0.7.5",
     "@angular/animations": "^7.2.7",
     "@angular/cli": "~7.3.6",