Allow optinally cmake 3.11

CMakeLists.txt

-cmake_minimum_required(VERSION 3.13)
+cmake_minimum_required(VERSION 3.11...3.13)
 
 
 set(
@@ -33,10 +33,17 @@ option(USE_BUNDLED_SODIUM "Use the bundled version of libsodium."
 option(USE_BUNDLED_ZLIB "Use the bundled version of zlib."
 	${HUNTER_ENABLED})
 
+if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.12)
 project(matrix_client
 	VERSION 0.3.0
 	DESCRIPTION "Client API library for Matrix, built on top of Boost.Asio"
 	HOMEPAGE_URL https://github.com/Nheko-Reborn/mtxclient)
+else()
+project(matrix_client
+	VERSION 0.3.0
+	DESCRIPTION "Client API library for Matrix, built on top of Boost.Asio")
+endif()
+
 
 option(ASAN "Compile with address sanitizers" OFF)
 option(BUILD_LIB_TESTS "Build tests" ON)