Annoucement of Dev-Cpp 2020 5.13-beta3

[Roy Qu]

Highlight in this version:
- Auto completion works with string
- Auto completion works with headers which include <window.h>
- Better debug output window</window.h>

For other fixes and changes, see News.txt

It can be download from https://github.com/royqh1979/Dev-CPP/releases or https://sourceforge.net/p/dev-cpp-2020/