Update README.md

Author: vwarchu

README.md

@@ -11,7 +11,7 @@ We hope you enjoy using the MSSQL-Django 3rd party backend.
 ## Features
 
 -  Supports Django 2.2, 3.0
--  Supports Microsoft SQL Server 2008/2008R2, 2012, 2014, 2016, 2017, 2019
+-  Tested on Microsoft SQL Server 2016, 2017, 2019
 -  Passes most of the tests of the Django test suite
 -  Compatible with
    [Micosoft ODBC Driver for SQL Server](https://docs.microsoft.com/en-us/sql/connect/odbc/microsoft-odbc-driver-for-sql-server),