Merge pull request #469 from snyk/feat/update-ignores

feat: Update snyk ignores

.snyk

@@ -1,5 +1,5 @@
 # Snyk (https://snyk.io) policy file, patches or ignores known vulnerabilities.
-version: v1.13.1
+version: v1.13.5
 # ignores vulnerabilities until expiry date; change duration by modifying expiry date
 ignore:
   'npm:mem:20180117':
@@ -9,4 +9,11 @@ ignore:
     - tap > nyc > yargs > os-locale > mem:
         reason: DoS vulnerability is not valid for CLI tool
         expires: '2019-12-19T10:35:25.346Z'
+  SNYK-JS-EXECA-174564:
+    - os-name > windows-release > execa:
+        reason: None given
+        expires: '2019-05-31T17:15:04.209Z'
+    - update-notifier > boxen > term-size > execa:
+        reason: None given
+        expires: '2019-05-31T17:15:04.209Z'
 patch: {}