fix: package.json & .snyk to reduce vulnerabilities

The following vulnerabilities are ignored:
- https://snyk.io/vuln/npm:ms:20170412
- https://snyk.io/vuln/npm:shelljs:20140723

Latest report for xbmc/generator-kodi-addon:
https://snyk.io/test/github/xbmc/generator-kodi-addon

.snyk

@@ -0,0 +1,46 @@
+# Snyk (https://snyk.io) policy file, patches or ignores known vulnerabilities.
+version: v1.7.0
+# ignores vulnerabilities until expiry date; change duration by modifying expiry date
+ignore:
+  'npm:ms:20170412':
+    - yeoman-generator > debug > ms:
+        reason: None given
+        expires: '2017-06-16T09:22:58.687Z'
+    - generator-git-init > yeoman-generator > debug > ms:
+        reason: None given
+        expires: '2017-06-16T09:22:58.687Z'
+    - generator-license > yeoman-generator > debug > ms:
+        reason: None given
+        expires: '2017-06-16T09:22:58.687Z'
+    - generator-git-init > yeoman-generator > yeoman-test > yeoman-generator > debug > ms:
+        reason: None given
+        expires: '2017-06-16T09:22:58.687Z'
+    - yeoman-generator > yeoman-environment > debug > ms:
+        reason: None given
+        expires: '2017-06-16T09:22:58.688Z'
+    - generator-git-init > yeoman-generator > yeoman-environment > debug > ms:
+        reason: None given
+        expires: '2017-06-16T09:22:58.688Z'
+    - generator-license > yeoman-generator > yeoman-environment > debug > ms:
+        reason: None given
+        expires: '2017-06-16T09:22:58.688Z'
+    - generator-git-init > yeoman-generator > yeoman-test > yeoman-generator > yeoman-environment > debug > ms:
+        reason: None given
+        expires: '2017-06-16T09:22:58.688Z'
+    - generator-git-init > yeoman-generator > yeoman-test > yeoman-environment > debug > ms:
+        reason: None given
+        expires: '2017-06-16T09:22:58.689Z'
+  'npm:shelljs:20140723':
+    - yeoman-generator > shelljs:
+        reason: None given
+        expires: '2017-06-16T09:22:58.689Z'
+    - generator-license > yeoman-generator > shelljs:
+        reason: None given
+        expires: '2017-06-16T09:22:58.689Z'
+    - generator-git-init > yeoman-generator > yeoman-test > yeoman-generator > shelljs:
+        reason: None given
+        expires: '2017-06-16T09:22:58.689Z'
+    - generator-git-init > yeoman-generator > shelljs:
+        reason: None given
+        expires: '2017-06-16T09:22:58.689Z'
+patch: {}

package.json

@@ -25,7 +25,8 @@
     "generator-license": "^5.1.0",
     "mkdirp": "^0.5.1",
     "yeoman-generator": "^1.1.0",
-    "yosay": "^2.0.0"
+    "yosay": "^2.0.0",
+    "snyk": "^1.30.1"
   },
   "devDependencies": {
     "yeoman-test": "^1.6.0",
@@ -53,8 +54,10 @@
   },
   "repository": "xbmc/generator-kodi-addon",
   "scripts": {
-    "prepublish": "gulp prepublish",
-    "test": "gulp"
+    "prepublish": "npm run snyk-protect && gulp prepublish",
+    "test": "gulp",
+    "snyk-protect": "snyk protect"
   },
-  "license": "Apache-2.0"
+  "license": "Apache-2.0",
+  "snyk": true
 }