fix(@nguniversal/hapi-engine): fix incorrect peer dependency on hapi

Closes angular#1969

Author: alan-agius4

modules/hapi-engine/package.json

@@ -15,7 +15,7 @@
     "@angular/common": "NG_VERSION",
     "@angular/core": "NG_VERSION",
     "@angular/platform-server": "NG_VERSION",
-    "hapi": "HAPI_VERSION"
+    "@hapi/hapi": "HAPI_VERSION"
   },
   "dependencies": {
     "@nguniversal/common": "0.0.0-PLACEHOLDER",