Update marked dependency (#3300)

Author: Mitko-Kerezov

npm-shrinkwrap.json

@@ -50,7 +50,7 @@
     "lockfile": "1.0.3",
     "lodash": "4.13.1",
     "log4js": "1.0.1",
-    "marked": "0.3.6",
+    "marked": "0.3.12",
     "marked-terminal": "2.0.0",
     "minimatch": "3.0.2",
     "mkdirp": "0.5.1",