chore: update .snyk file to ignore cryptiles

There's a new vulnerability reported in the outdated @google-cloud/storage@1.1.1
which is introduced by a dependency on reaction-file-collections' dependency tus-node-server.
I'm adding an ignore as there's a PR that has been accepted to resolve this dependency vulnerability.
Additionally, Reaction Commerce does not execute the code that has the vulnerability in this case.

.snyk

@@ -8,9 +8,13 @@ ignore:
         expires: '2018-08-26T20:23:03.274Z'
   'npm:hoek:20180212':
     - '*':
-      reason: "No direct dependency upgrade available. Issue filed here: https://github.com/tus/tus-node-server/issues/119"
+      reason: "PR Accepted to tus-node-server which will resolve this vulnerability https://github.com/tus/tus-node-server/pull/120"
       expires: '2018-08-26T20:23:03.274Z'
   'npm:tunnel-agent:20170305':
     - '*':
-      reason: "No direct dependency upgrade available. Issue filed here: https://github.com/tus/tus-node-server/issues/119"
+      reason: "PR Accepted to tus-node-server which will resolve this vulnerability https://github.com/tus/tus-node-server/pull/120"
+      expires: '2018-08-26T20:23:03.274Z'
+  'npm:cryptiles:20180710':
+    - '*':
+      reason: "PR Accepted to tus-node-server which will resolve this vulnerability https://github.com/tus/tus-node-server/pull/120"
       expires: '2018-08-26T20:23:03.274Z'