Add advisory for Laravel cookie serialization vulnerability

laravel/framework/2018-08-08-1.yaml

@@ -0,0 +1,26 @@
+title:     Cookie serialization vulnerability
+link:      https://laravel.com/docs/5.6/upgrade#upgrade-5.6.30
+cve:       ~
+branches:
+    5.0.x:
+        time:     ~
+        versions: ['>=5.0.0', '<=5.0.35']
+    5.1.x:
+        time:     ~
+        versions: ['>=5.1.0', '<=5.1.46']
+    5.2.x:
+        time:     ~
+        versions: ['>=5.2.0', '<=5.2.45']
+    5.3.x:
+        time:     ~
+        versions: ['>=5.3.0', '<=5.3.31']
+    5.4.x:
+        time:     ~
+        versions: ['>=5.4.0', '<=5.4.36']
+    5.5.x:
+        time:     2018-08-07T18:07:12Z
+        versions: ['>=5.5.0', '<5.5.42']
+    5.6.x:
+        time:     2018-08-07 07:53:14
+        versions: ['>=5.6.0', '<5.6.30']
+reference: composer://laravel/framework