update dependencies

package.json

@@ -40,14 +40,14 @@
     "lwip": "~0.0.8",
     "mime": "~1.3.4",
     "node-df": "crafatar/node-df",
-    "redis": "~2.6.3",
-    "request": "~2.78.0",
+    "redis": "~2.7.1",
+    "request": "~2.81.0",
     "toobusy-js": "~0.5.1"
   },
   "devDependencies": {
-    "coveralls": "~2.11.14",
+    "coveralls": "~2.13.1",
     "istanbul": "~0.4.5",
-    "mocha": "~3.1.2",
-    "mocha-lcov-reporter": "~1.2.0"
+    "mocha": "~3.3.0",
+    "mocha-lcov-reporter": "~1.3.0"
   }
 }