fix: package.json & .snyk to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/npm:debug:20170905
- https://snyk.io/vuln/npm:fresh:20170908


The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/npm:debug:20170905

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: v1.7.1
+ignore: {}
+# patches apply the minimum changes required to fix a vulnerability
+patch:
+  'npm:debug:20170905':
+    - mongoose > mquery > debug:
+        patched: '2017-09-28T02:16:03.878Z'

package.json

@@ -10,7 +10,9 @@
   "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",
@@ -22,7 +24,7 @@
     "ejs": "1.0.0",
     "ejs-locals": "1.0.2",
     "errorhandler": "1.2.0",
-    "express": "4.12.4",
+    "express": "4.15.5",
     "express-fileupload": "0.0.5",
     "humanize-ms": "1.0.1",
     "jquery": "^2.2.4",
@@ -36,9 +38,11 @@
     "optional": "^0.1.3",
     "st": "0.2.4",
     "stream-buffers": "^3.0.1",
-    "tap": "^5.7.0"
+    "tap": "^5.7.0",
+    "snyk": "^1.41.1"
   },
   "devDependencies": {
     "browserify": "^13.1.1"
-  }
+  },
+  "snyk": true
 }