Update har-validator dependency for nsp advisory #76

See https://nodesecurity.io/advisories/76

package.json

@@ -41,7 +41,7 @@
     "combined-stream": "~1.0.5",
     "isstream": "~0.1.2",
     "is-typedarray": "~1.0.0",
-    "har-validator": "~2.0.2"
+    "har-validator": "~2.0.6"
   },
   "scripts": {
     "test": "npm run lint && npm run test-ci && npm run test-browser",