Bump CMake version for interface target to 3.0

CMakeLists.txt

@@ -177,7 +177,7 @@ install(
     DESTINATION ${GLM_INSTALL_CONFIGDIR}
 )
 
-if (NOT CMAKE_VERSION VERSION_LESS "2.8.12")
+if (NOT CMAKE_VERSION VERSION_LESS "3.0")
     add_library(glm INTERFACE)
     target_include_directories(glm INTERFACE
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>

cmake/glmBuildConfig.cmake.in

@@ -1,6 +1,6 @@
 set(GLM_VERSION "@GLM_VERSION@")
 set(GLM_INCLUDE_DIRS "@CMAKE_CURRENT_SOURCE_DIR@")
 
-if (NOT CMAKE_VERSION VERSION_LESS "2.8.12")
+if (NOT CMAKE_VERSION VERSION_LESS "3.0")
     include("${CMAKE_CURRENT_LIST_DIR}/glmTargets.cmake")
 endif()

cmake/glmConfig.cmake.in

@@ -4,6 +4,6 @@ set(GLM_VERSION "@GLM_VERSION@")
 
 set_and_check(GLM_INCLUDE_DIRS "@PACKAGE_CMAKE_INSTALL_INCLUDEDIR@")
 
-if (NOT CMAKE_VERSION VERSION_LESS "2.8.12")
+if (NOT CMAKE_VERSION VERSION_LESS "3.0")
     include("${CMAKE_CURRENT_LIST_DIR}/glmTargets.cmake")
 endif()