fix(package): update file-stream-rotator to version 0.5.5

Closes #58

Author: greenkeeper[bot]

package.json

@@ -12,7 +12,7 @@
     "crypto-promise": "^2.0.0",
     "debug": "^3.1.0",
     "express": "^4.16.0",
-    "file-stream-rotator": "^0.2.0",
+    "file-stream-rotator": "^0.5.5",
     "mkdirp": "^0.5.1",
     "mocha": "^5.0.5",
     "morgan": "^1.9.0",