Making python 3.7 + compatible

[Keyrat06]

Python warning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working

[nitzmahone]

Works back to Python3.3, so LGTM

[webknjaz]

Should I absorb this commit into #172, which also enables testing against proper Python 3.7?

[Keyrat06]

Sure, sounds good to me.

[webknjaz]

Done!

[The-Compiler]

Duplicate of #181 FWIW.

[webknjaz]

@The-Compiler also absorbed into #172, which also enables testing. I hope it'll get reviewed and merged at some point

[naphthalene]

LGTM! Is there a release planned?

[kishanterry]

When is this PR expected to be merged and released?

[blazingkin]

I would also like to know when this PR will be released

[ingydotnet]

@blazingkin In the next release. Hopefully in February.

[stratosgear]

Also looking forward for this.

The DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working warning, "pollutes" my tox outputs :)

[et304383]

Can we please get this merged in?

[perlpunk]

Is this still needed since #181 was merged already?

[webknjaz]

You can close this one then

[perlpunk]

Thanks!