[cmake] Require CMake version 3.10 or newer

CMake 4.0 will be released soon and it marks
3.10 as deprecated and refuses to work with
3.5 or older versions without additional
flags for the CMake call.

CMakeLists.txt

@@ -26,7 +26,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.10)
 project(Snappy VERSION 1.2.1 LANGUAGES C CXX)
 
 # C++ standard can be overridden when this is used as a sub-project.
@@ -261,9 +261,7 @@ target_sources(snappy
     "snappy-stubs-internal.cc"
     "snappy.cc"
     "${PROJECT_BINARY_DIR}/config.h"
-
-  # Only CMake 3.3+ supports PUBLIC sources in targets exported by "install".
-  $<$<VERSION_GREATER:CMAKE_VERSION,3.2>:PUBLIC>
+  PUBLIC
     $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/snappy-c.h>
     $<INSTALL_INTERFACE:include/snappy-c.h>
     $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/snappy-sinksource.h>