Fix ASAN warning in HexDump sample, remove redundant cmake version check (#305, #303)

* Fixes #303

Author: winapiadmin

CMakeLists.txt

@@ -1,7 +1,5 @@
 if(${CMAKE_VERSION} VERSION_LESS 3.27.0)
     cmake_minimum_required(VERSION 3.0)
-elseif(${CMAKE_VERSION} VERSION_LESS 3.31.0)
-    cmake_minimum_required(VERSION 3.6)
 else()
     cmake_minimum_required(VERSION 3.10)
 endif()

samples/HexDump/Main.cpp

@@ -39,6 +39,6 @@ int main()
 
     void* p = malloc(100);
     PLOGI << "p: " << plog::hexdump(p, 100);
-
+    free(p);
     return 0;
 }