refactor: upgrade cookie-session from 2.0.0-beta.3 to 2.0.0 (#1985)

Author: snyk-bot

package-lock.json

@@ -40,7 +40,7 @@
     "body-parser": "1.19.1",
     "commander": "6.2.1",
     "connect-flash": "0.1.1",
-    "cookie-session": "2.0.0-beta.3",
+    "cookie-session": "2.0.0",
     "copy-to-clipboard": "3.3.1",
     "csurf": "1.11.0",
     "express": "4.17.1",