upgrade old packages

package.json

@@ -86,8 +86,8 @@
     "react": "~15.0.1",
     "react-dom": "~15.0.1",
     "redis": "~2.6.5",
-    "reveal.js": "~3.2.0",
-    "socket.io": "~1.3.0",
+    "reveal.js": "~3.4.0",
+    "socket.io": "~1.7.0",
     "socket.io-client": "~1.7.0",
     "sprintf": "~0.1.5",
     "swig": "~1.4.0"