The 18.7 release is the third major release of SSMS in 2020.
Key changes include:
- Fix for Database diagrams add table dialog.
- Installation of Azure Data Studio.
- Extended Events script with WAIT type name.
Remember that we can submit feedback anytime on User Voice.
You can read the complete announcement here https://cloudblogs.microsoft.com/sqlserver/2020/10/20/sql-server-management-studio-18-7-now-generally-available/