chores: update to LUA 5.3 (#4203)

Co-authored-by: Peter Feerick <peter.feerick@gmail.com>
Co-authored-by: philmoz <phil.a.mitchell@gmail.com>

radio/src/lua/api_filesystem.cpp

@@ -21,8 +21,7 @@
 
 #define LUA_LIB
 
-#include <cstdio>
-
+#include "edgetx.h"
 #include "lua_api.h"
 #include "api_filesystem.h"
 
@@ -83,6 +82,9 @@ int luaDir(lua_State* L)
   return 1;
 }
 
+void luaPushDateTime(lua_State * L, uint32_t year, uint32_t mon, uint32_t day,
+                     uint32_t hour, uint32_t min, uint32_t sec);
+
 /*luadoc
 @function fstat(path)
 
@@ -178,7 +180,7 @@ int luaDelete(lua_State* L)
     TRACE("luaDelete cannot delete file/folder %s", filename);
   }
 
-  lua_pushunsigned(L, res);
+  lua_pushinteger(L, res);
   return 1;
 }