Update semver to version 5.3.0 (#836)

Author: lpinca

package.json

@@ -58,7 +58,7 @@
     "octonode": "0.7.6",
     "request": "2.73.0",
     "require-dir": "0.3.0",
-    "semver": "5.2.0",
+    "semver": "5.3.0",
     "st": "1.2.0",
     "strftime": "0.9.2"
   },