Add changelog notes for CMake dependency bump

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4f63d175a14c2fbd53da16dca5b757c1d253a3e3..c8a7bf6dd4894c91bd6270fe57d8d2cfe97a40b9 100644 (file)
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Portable source tarballs now use the “ustar” POSIX format
 - Minimum version of Flex required to build Graphviz is now 2.5.2
 - Minimum version of Bison required to build Graphviz is now 3.0
+- Minimum version of CMake required to build Graphviz using CMake is now 3.1
 
 ### Fixed
 - gvpr: line numbers in gvpr errors/warnings are incorrect #1594