Maintenance: Set a CMake policy version (#749)

3.30 added a new policy around pending removal of the FindBoost module. This is quite noisy without this setting.
cctbx · Aug 16, 2024 · 9a8cff3 · 9a8cff3
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commit 9a8cff3
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diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.20 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.20...3.30 FATAL_ERROR)
 
 project(dxtbx LANGUAGES C CXX)
 

diff --git a/newsfragments/749.misc b/newsfragments/749.misc
@@ -0,0 +1 @@
+Set a CMake policy version, to avoid warnings on newer version.