Update session format version number in e2e

e2e/session/session-empty-modules-list.json

 {
     "header": {
         "source": "jalhyd",
-        "format_version": "1.2",
+        "format_version": "1.3",
         "created": "2019-08-21T13:20:54.284Z"
     },
     "session": [