message: Update version to 4.4.0-alpha.
diff: @@ -87,11 +87,11 @@ int clock_gettime(clock_id_t which_clock, struct timespec *t);
  /*----------------------------------------------------------------------------*/
  #define SWOOLE_MAJOR_VERSION 4
  -#define SWOOLE_MINOR_VERSION 3
  -#define SWOOLE_RELEASE_VERSION 2
  -#define SWOOLE_EXTRA_VERSION ""
  -#define SWOOLE_VERSION "4.3.2"
  -#define SWOOLE_VERSION_ID 40302
  +#define SWOOLE_MINOR_VERSION 4
  +#define SWOOLE_RELEASE_VERSION 0
  +#define SWOOLE_EXTRA_VERSION "alpha"
  +#define SWOOLE_VERSION "4.4.0-alpha"
  +#define SWOOLE_VERSION_ID 40400
  #define SWOOLE_BUG_REPORT \
  "A bug occurred in Swoole-v" SWOOLE_VERSION ", please report it.\n"\
  "The Swoole developers probably don't know about it,\n"\
  