fix: Fix can not parse typedef correctly if there are struct/enum/cla…

…ss node before the typedef declaration (#38)

Based on the current implementation of the logic of the type alias, the
code below can not be handled
```c++
enum AUDIO_SESSION_OPERATION_RESTRICTION {

  AUDIO_SESSION_OPERATION_RESTRICTION_NONE = 0,
};

typedef const char* user_id_t;
typedef void* view_t;
```