Add support for Python 3.7 and drop 3.4

[hugovk]

Some dependencies need updating to support Python 3.7, including pandas.

There's no release of pandas which supports both 3.4 and 3.7.

So let's drop 3.4, it's very nearly EOL, on 2019-03-16.

https://en.wikipedia.org/wiki/CPython#Version_history

[ParthS007]

@hugovk Can you please resolve conflicts. I have requested a review of @kenneth-reitz and @timofurrer.

Thanks

[timofurrer]

That's something Kenneth has to approve.
I'd wait for EOL - 3.4.10. See https://www.python.org/dev/peps/pep-0429/#id4

[hugovk]

Python 3.4's EOL is 2019-03-16:

• https://devguide.python.org/#status-of-python-branches

[claudep]

What about rebasing and squashing commits for a cleaner history?

[hugovk]

OK, rebased to drop the merge commits.

If you want them as a single commit, you can use the Squash and merge option:

[timofurrer]

That's fine. Thanks.

We still need BDFL approval in order to merge that. Thanks for your patience!

🎉

[hugovk]

The repo has now been transferred to @vinayak-mehta.

@vinayak-mehta Is this okay to merge? It's had three approvals so far. Thanks!

[claudep]

Could you please rebase the branch?

[hugovk]

Rebased!

Dropped the changes to requirements.txt, they've been dealt with in master.

[claudep]

Awesome, thanks!

[hugovk]

You're welcome! And thanks for the review and merge!