add "description" for strictfromclause role

Author: zzzeek

sqlalchemy-stubs/sql/roles.pyi

@@ -33,7 +33,10 @@ class BinaryElementRole(ExpressionElementRole): ...
 class InElementRole(SQLRole): ...
 class JoinTargetRole(AllowsLambdaRole, UsesInspection, StructuralRole): ...
 class FromClauseRole(ColumnsClauseRole, JoinTargetRole): ...
-class StrictFromClauseRole(FromClauseRole): ...
+
+class StrictFromClauseRole(FromClauseRole):
+    description: str = ...
+
 class AnonymizedFromClauseRole(StrictFromClauseRole): ...
 class CoerceTextStatementRole(SQLRole): ...
 class StatementRole(CoerceTextStatementRole): ...