Updates project version to 3.4.0

Bumps the project's version number from 3.3.0 to 3.4.0.

Adds a compile definition to expose the project version via the
`OMATH_VERSION` macro.

Author: orange-cpp

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.26)
 
-project(omath VERSION 3.3.0 LANGUAGES CXX)
+project(omath VERSION 3.4.0 LANGUAGES CXX)
 
 include(CMakePackageConfigHelpers)
 
@@ -39,6 +39,8 @@ endif ()
 
 add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
 
+target_compile_definitions(${PROJECT_NAME} PUBLIC OMATH_VERSION="${PROJECT_VERSION}")
+
 if (OMATH_IMGUI_INTEGRATION)
     target_compile_definitions(${PROJECT_NAME} PUBLIC OMATH_IMGUI_INTEGRATION)