be explicit about hapi and inert version

Author: codisredding

examples/hapi/package.json

@@ -1,9 +1,9 @@
 {
-    "name": "sockjs-hapi",
-    "version": "0.0.0-unreleasable",
-    "dependencies": {
-        "hapi": "*",
-        "inert": "*",
-        "sockjs": "*"
-    }
+  "name": "sockjs-hapi",
+  "version": "0.0.0-unreleasable",
+  "dependencies": {
+    "hapi": "15.x.x",
+    "inert": "4.x.x",
+    "sockjs": "*"
+  }
 }