According to the wiki, no other changes should be needed.
@ -4,7 +4,7 @@
{
"name": "Check mailbox size",
"summary": "Send an email summarizing the current space used by a mailbox",
"version": "11.0.1.0.0",
"version": "12.0.1.0.0",
"development_status": "Beta",
"website": "https://github.com/OCA/social",
"author": "Agile Business Group, Odoo Community Association (OCA)",