chore(package): update dependencies

http://greenkeeper.io/

package.json

@@ -7,26 +7,26 @@
   "private": true,
   "license": "MIT",
   "dependencies": {
-    "async": "^0.9.0",
+    "async": "^1.5.0",
     "blueimp-md5": "^1.1.0",
     "body-parser": "^1.12.3",
-    "chance": "^0.7.5",
+    "chance": "^0.8.0",
     "cheerio": "^0.19.0",
     "compression": "^1.4.3",
     "connect-mongo": "^0.8.1",
     "kerberos": "0.0.17",
     "cookie": "0.2.3",
     "cookie-parser": "1.4.0",
-    "ejs": "^1.0.0",
+    "ejs": "^2.3.4",
     "emojify.js": "^1.0.1",
     "express": ">=4.5",
     "express-session": "^1.11.1",
     "formidable": "^1.0.17",
-    "highlight.js": "^8.4.0",
+    "highlight.js": "^9.0.0",
     "imgur": "^0.1.7",
     "jsdom-nogyp": "^0.8.3",
-    "lz-string": "1.3.6",
-    "markdown-pdf": "^5.2.0",
+    "lz-string": "1.4.4",
+    "markdown-pdf": "^6.0.0",
     "marked": "^0.3.5",
     "method-override": "^2.3.2",
     "moment": "^2.10.3",
@@ -40,14 +40,14 @@
     "passport-twitter": "^1.0.3",
     "passport.socketio": "^3.6.1",
     "pg": "4.x",
-    "randomcolor": "^0.2.0",
-    "shortid": "2.2.2",
-    "socket.io": "1.3.5",
+    "randomcolor": "^0.4.2",
+    "shortid": "2.2.4",
+    "socket.io": "1.3.7",
     "string": "^3.2.0",
     "toobusy-js": "^0.4.1",
-    "winston": "^1.0.0",
-    "mustache": "2.1.3",
-    "reveal.js": "3.1.0"
+    "winston": "^2.1.1",
+    "mustache": "2.2.1",
+    "reveal.js": "3.2.0"
   },
   "engines": {
     "node": "0.10.x"