fix(package): update @angular/compiler to version 5.1.1

Closes #14

Author: greenkeeper[bot]

package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@angular/animations": "^4.0.0",
     "@angular/common": "^4.0.0",
-    "@angular/compiler": "^4.0.0",
+    "@angular/compiler": "^5.1.1",
     "@angular/core": "^4.0.0",
     "@angular/forms": "^4.0.0",
     "@angular/http": "^4.0.0",