moved jsdoc-to-markdown to devDependencies

package.json

@@ -23,7 +23,6 @@
   "dependencies": {
     "bluebird": "^2.9.30",
     "debug": "^2.2.0",
-    "jsdoc-to-markdown": "^1.2.0",
     "mime": "^1.3.4",
     "request": "^2.58.0"
   },
@@ -31,6 +30,7 @@
     "coveralls": "^2.11.2",
     "del": "^2.0.2",
     "istanbul": "^0.3.17",
+    "jsdoc-to-markdown": "^1.2.0",
     "mocha": "^2.2.5",
     "mocha-lcov-reporter": "0.0.2",
     "should": "^7.0.1"