Update dependencies

package.json

@@ -20,18 +20,18 @@
     "bin": "bin"
   },
   "dependencies": {
+    "hiredis": "^0.5.0",
     "later": "^1.2.0",
     "libxmljs": "^0.18.0",
-    "redis": "^2.6.2",
-    "hiredis": "^0.5.0",
-    "mongodb": "^2.2.4",
+    "mongodb": "^2.2.16",
+    "redis": "^2.6.3",
     "seedrandom": "^2.4.2"
   },
   "devDependencies": {
-    "coffee-script": "^1.10.0"
+    "coffee-script": "^1.12.2"
   },
   "engines": {
-    "node": ">=4.4.0 <5.0"
+    "node": ">=6.9.2 <7.0"
   },
   "scripts": {
     "prepublish": "npm run compile",