[Development] Let's please drop MSVC 2013 for 5.10

[André Pönitz]

On Thu, Jun 15, 2017 at 04:07:03PM -0700, Thiago Macieira wrote:
> character set. Without the /utf-8 option added in MSVC 2015 Update 2, the 
> conversion fails and the compiler prints:
> 
> warning C4566: character represented by universal-character-name '\u0431' 
> cannot be represented in the current code page (1252)
> 
> [ok, not a C++11 issue per se, but we still want to use Unicode source code]

There was never *consensus* on using something outside plain ASCII in
Qt sources.

This is predicted, self-inflicted pain.

> But I repeat: these problems are going to turn up again and again.

Of course. But the problem is not compilers.

Andre'