Add future import

Author: chadrik

src/rez/suite.py

@@ -2,6 +2,8 @@
 # Copyright Contributors to the Rez Project
 
 
+from __future__ import annotations
+
 from rez.utils.execution import create_forwarding_script
 from rez.exceptions import SuiteError, ResolvedContextError
 from rez.resolved_context import ResolvedContext