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:ms:20170412


The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/npm:debug:20170905
- https://snyk.io/vuln/npm:ms:20170412

Latest report for billchurch/webssh2:
https://snyk.io/test/github/billchurch/webssh2

.snyk

@@ -1,5 +1,5 @@
 # Snyk (https://snyk.io) policy file, patches or ignores known vulnerabilities.
-version: v1.7.1
+version: v1.10.1
 # ignores vulnerabilities until expiry date; change duration by modifying expiry date
 ignore:
   'npm:ms:20170412':
@@ -130,4 +130,11 @@ ignore:
     - express > serve-static > send > mime:
         reason: no suitable upgrade path
         expires: '2017-10-27T18:37:13.178Z'
-patch: {}
+# patches apply the minimum changes required to fix a vulnerability
+patch:
+  'npm:debug:20170905':
+    - socket.io > socket.io-adapter > socket.io-parser > debug:
+        patched: '2018-02-08T20:34:45.331Z'
+  'npm:ms:20170412':
+    - socket.io > socket.io-adapter > socket.io-parser > debug > ms:
+        patched: '2018-02-08T20:34:45.331Z'

package.json

@@ -34,9 +34,10 @@
     "express-session": "^1.15.6",
     "morgan": "^1.9.0",
     "read-config": "^1.6.0",
-    "socket.io": "^1.7.4",
+    "socket.io": "2.0.2",
     "ssh2": "^0.5.5",
-    "validator": "^9.0.0"
+    "validator": "^9.0.0",
+    "snyk": "^1.69.7"
   },
   "scripts": {
     "start": "node index.js",
@@ -45,7 +46,9 @@
     "watch": "nodemon index.js",
     "build": "webpack --config webpack.prod.js",
     "standard": "standard --verbose | snazzy",
-    "cleanmac": "find . -name '.DS_Store' -type f -delete"
+    "cleanmac": "find . -name '.DS_Store' -type f -delete",
+    "snyk-protect": "snyk protect",
+    "prepublish": "npm run snyk-protect"
   },
   "devDependencies": {
     "@fortawesome/fontawesome": "^1.1.3",
@@ -58,7 +61,6 @@
     "file-loader": "^1.1.6",
     "nodemon": "^1.11.0",
     "snazzy": "^7.0.0",
-    "snyk": "^1.39.1",
     "standard": "^10.0.3",
     "style-loader": "^0.20.1",
     "uglifyjs-webpack-plugin": "^1.1.8",
@@ -72,5 +74,6 @@
     "ignore": [
       "public/webssh2.bundle.js"
     ]
-  }
+  },
+  "snyk": true
 }