fix(package): update @angular/platform-browser to version 5.1.2

Closes #110

Author: greenkeeper[bot]

package.json

@@ -33,7 +33,7 @@
     "@angular/forms": "^4.3.6",
     "@angular/http": "^4.3.6",
     "@angular/material": "^2.0.0-beta.10",
-    "@angular/platform-browser": "^4.3.6",
+    "@angular/platform-browser": "^5.1.2",
     "@angular/platform-browser-dynamic": "^4.3.6",
     "@angular/platform-server": "^4.3.6",
     "@angular/router": "^4.3.6",