metadata.json: add 3.20 to shell-version list
@ -1,6 +1,6 @@
{
"description": "Firewall Extension",
"shell-version": ["3.18"],
"shell-version": ["3.18", "3.20"],
"uuid": "firewall@subgraph.com",
"name": "Firewall Extension",
"settings-schema": "com.subgraph.firewall"