update nconf, gm deps

package.json

@@ -28,14 +28,14 @@
     "daemon": "~1.1.0",
     "express": "^4.9.5",
     "express-session": "^1.8.2",
-    "gm": "1.16.0",
+    "gm": "1.17.0",
     "gravatar": "^1.1.0",
     "heapdump": "^0.3.0",
     "less": "^2.0.0",
     "logrotate-stream": "^0.2.3",
     "mkdirp": "~0.5.0",
     "morgan": "^1.3.2",
-    "nconf": "~0.6.7",
+    "nconf": "~0.7.1",
     "nodebb-plugin-dbsearch": "^0.1.0",
     "nodebb-plugin-markdown": "^0.8.0",
     "nodebb-plugin-mentions": "^0.7.0",