update npm packages to latest

package.json

@@ -6,21 +6,21 @@
     "start": "node ./bin/www"
   },
   "dependencies": {
-    "body-parser": "~1.16.0",
+    "body-parser": "~1.18.2",
     "cookie-parser": "~1.4.3",
     "bitcoin": "3.0.1",
     "crypto-js": "3.1.9-1",
     "debug": "~2.6.0",
     "decimal.js":"7.2.3",
-    "express": "~4.14.1",
-    "express-session": "1.15.2",
+    "express": "~4.16.3",
+    "express-session": "1.15.6",
     "jstransformer-markdown-it": "^2.0.0",
-    "moment": "^2.18.1",
-    "moment-duration-format": "1.3.0",
+    "moment": "^2.21.0",
+    "moment-duration-format": "2.2.2",
     "monk": "^4.0.0",
-    "morgan": "~1.7.0",
-    "pug": "2.0.0-rc.4",
+    "morgan": "~1.9.0",
+    "pug": "2.0.1",
     "serve-favicon": "~2.3.2",
-    "simple-git": "1.85.0"
+    "simple-git": "1.92.0"
   }
 }