fix(package): update @angular/platform-browser-dynamic to version 5.2.1

Closes #21

Author: greenkeeper[bot]

package.json

@@ -21,7 +21,7 @@
     "@angular/forms": "^4.0.0",
     "@angular/http": "^4.0.0",
     "@angular/platform-browser": "^4.0.0",
-    "@angular/platform-browser-dynamic": "^4.0.0",
+    "@angular/platform-browser-dynamic": "^5.2.1",
     "@angular/router": "^4.0.0",
     "@nglibrary/ngx-choosy": "^1.1.0",
     "bootstrap-sass": "^3.3.7",