Drop python3.4 support

[fafhrd91]

i think it is time

[AraHaan]

Yeah 3.4 has a coroutine bug which was fixed since 3.5 and 3.6 is actually better. However 3.4 users who use aiohttp on debian systems don't even have a final version of 3.5 so that is an issue their last version is 3.4 for now unless they can build from source.

[asvetlov]

It's very tempting decision but I'm thinking about python 3.5 support in major linux distributions.
Say, Debian includes Python 3.4 only in the latest Debian Jessie.

[AraHaan]

Yeah, which is sad that means they would have to manually compile 3.6 but it is good thing not hard to do.

Other than that if they can make install I think they would be fine with building 3.6 from source.

[asvetlov]

No, it's not an option.

IIRC Blind sudo make install on Debian effectively breaks OS down to non-bootable state :)

[fafhrd91]

@asvetlov do you know when debian is planing to upgrade?

latest ubuntu lts already uses python3.5, i guess redhead should too.

[mwfrojdman]

Debian Stretch ought to be released in the second half of 2017 if progress is as before. Seems it will include only 3.5, not 3.6 as freeze is around now.

[Rapptz]

I haven't dropped 3.4 support in my libraries for similar reasons. Not every distro comes with it and truthfully if there's a compatibility layer then the effort of supporting 3.4 and 3.5+ is not too steep.

[asvetlov]

Let's wait for a while

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