Revert "Revert "[CMake] Bumps minimum version to 3.20.0.""

This reverts commit 92523a35a827539db8557bbc3ecab7f9ea3f6ade.

Reland to see whether CIs are updated.

GitOrigin-RevId: 1ef4c3c859728008cf707cad8d67f45ae5070ae1
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 89f08b8..1e273d4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.13.4)
+cmake_minimum_required(VERSION 3.20.0)
 
 project( libclc VERSION 0.2.0 LANGUAGES CXX C)