fix: package.json & .snyk to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/npm:dustjs-linkedin:20160819
- https://snyk.io/vuln/npm:mime:20170907
- https://snyk.io/vuln/npm:fresh:20170908
- https://snyk.io/vuln/npm:debug:20170905
- https://snyk.io/vuln/npm:marked:20170112
- https://snyk.io/vuln/npm:moment:20170905
- https://snyk.io/vuln/npm:debug:20170905
- https://snyk.io/vuln/npm:st:20171013
- https://snyk.io/vuln/npm:mime:20170907


The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/npm:marked:20170907

Latest report for snyk/goof:
https://snyk.io/test/github/snyk/goof

.snyk

@@ -0,0 +1,8 @@
+# Snyk (https://snyk.io) policy file, patches or ignores known vulnerabilities.
+version: v1.10.1
+ignore: {}
+# patches apply the minimum changes required to fix a vulnerability
+patch:
+  'npm:marked:20170907':
+    - marked:
+        patched: '2017-12-12T04:19:11.556Z'

package.json

@@ -10,35 +10,39 @@
   "scripts": {
     "start": "node app.js",
     "build": "browserify -r jquery > public/js/bundle.js",
-    "cleanup": "mongo express-todo --eval 'db.todos.remove({});'"
+    "cleanup": "mongo express-todo --eval 'db.todos.remove({});'",
+    "snyk-protect": "snyk protect",
+    "prepublish": "npm run snyk-protect"
   },
   "dependencies": {
     "body-parser": "1.9.0",
     "cfenv": "^1.0.4",
     "cookie-parser": "1.3.3",
     "consolidate": "0.14.5",
-    "dustjs-linkedin": "2.5.0",
+    "dustjs-linkedin": "2.6.0",
     "dustjs-helpers": "1.5.0",
     "ejs": "1.0.0",
     "ejs-locals": "1.0.2",
     "errorhandler": "1.2.0",
-    "express": "4.12.4",
+    "express": "4.16.0",
     "express-fileupload": "0.0.5",
     "humanize-ms": "1.0.1",
     "jquery": "^2.2.4",
-    "marked": "0.3.5",
+    "marked": "0.3.7",
     "method-override": "latest",
-    "moment": "2.15.1",
-    "mongoose": "4.2.4",
+    "moment": "2.19.3",
+    "mongoose": "4.11.14",
     "morgan": "latest",
     "ms": "^0.7.1",
     "npmconf": "0.0.24",
     "optional": "^0.1.3",
-    "st": "0.2.4",
+    "st": "1.2.2",
     "stream-buffers": "^3.0.1",
-    "tap": "^5.7.0"
+    "tap": "^5.7.0",
+    "snyk": "^1.56.0"
   },
   "devDependencies": {
     "browserify": "^13.1.1"
-  }
+  },
+  "snyk": true
 }