[Snyk] Fix for 4 vulnerable dependency paths (#4398)

* fix: package.json & .snyk to reduce vulnerabilities


The following vulnerabilities are ignored:
- https://snyk.io/vuln/npm:hoek:20180212

Latest report for mozilla/addons-frontend:
https://snyk.io/test/github/mozilla/addons-frontend

* Added ignore reasons

* Remove prepublish script

.snyk

@@ -7,5 +7,18 @@ ignore:
           We only use this for DOMPurify (no external fetching) so we are
           probably not vulnerable
         expires: '2018-02-23T22:52:31.923Z'
+  'npm:hoek:20180212':
+    - jsdom > request > hawk > hoek:
+        reason: Our app doesn't rely on HAWK
+        expires: '2018-03-17T17:23:51.194Z'
+    - jsdom > request > hawk > boom > hoek:
+        reason: Our app doesn't rely on HAWK
+        expires: '2018-03-17T17:23:51.194Z'
+    - jsdom > request > hawk > sntp > hoek:
+        reason: Our app doesn't rely on HAWK
+        expires: '2018-03-17T17:23:51.194Z'
+    - jsdom > request > hawk > cryptiles > boom > hoek:
+        reason: Our app doesn't rely on HAWK
+        expires: '2018-03-17T17:23:51.195Z'
 patch: {}
 version: v1.10.1

package.json

@@ -273,7 +273,7 @@
     "semver": "^5.3.0",
     "shelljs": "^0.8.0",
     "sinon": "^4.0.0",
-    "snyk": "^1.69.3",
+    "snyk": "^1.69.7",
     "style-loader": "^0.20.1",
     "stylelint": "^8.0.0",
     "stylelint-config-standard": "^17.0.0",