Downgraded Joi from 13.1.0 to 10.0.0 to support node v4

sidag95 · sidag95 · commit 8f77bd23c2a2 · 2018-01-08T17:33:14.000+05:30
diff --git a/package.json b/package.json
@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "hoek": "^4.0.1",
-    "joi": "^13.1.0",
+    "joi": "^10.0.0",
     "node-expat": "^2.3.15"
   },
   "bin": {
