fix(package): update @angular/common to version 5.1.0

Closes #13

Author: greenkeeper[bot]

package.json

@@ -15,7 +15,7 @@
   },
   "dependencies": {
     "@angular/animations": "^4.0.0",
-    "@angular/common": "^4.0.0",
+    "@angular/common": "^5.1.0",
     "@angular/compiler": "^4.0.0",
     "@angular/core": "^4.0.0",
     "@angular/forms": "^4.0.0",