MSSQL-Server in Version 10 does not support DropTableCascadeConstraints

We use MSSQL-Server in version 10. It does not support DropTableCascadeConstraints as we get an Exception when calling Liquibase.dropAll. 
I changed the version check so that it only returns true if the version is greater than 10. 
I didn't check, if MSSQL-Server in a version greater than 10 does support DropTableCascadeConstraints.