Support for multiple granularities in humanize

[hwillard98]

This implements a feature in #716 to use multiple granularities as an input to humanize.

For example,

>>> later140 = self.now.shift(seconds=8400)
>>> later140.humanize(granularity="minute")
"in 140 minutes" 
>>> later140.humanize(granularity=["hour", "minute"])
"in 2 hours and 20 minutes"

[codecov-io]

Codecov Report

Merging #722 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #722   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           9      9           
  Lines        1606   1678   +72     
  Branches      266    283   +17     
=====================================
+ Hits         1606   1678   +72

Impacted Files	Coverage Δ
arrow/locales.py	100% <100%> (ø)	⬆️
arrow/arrow.py	100% <100%> (ø)	⬆️
arrow/factory.py	100% <0%> (ø)	⬆️

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[hwillard98]

@jadchaar do you have any comments or feedback for these commits?

[jadchaar]

Hey @hwillard98, apologies for the delayed response. I was quite busy this holiday weekend. At first glance, the work looks solid, but I'd like to take a closer look when I get some more free time. I talked to @systemcatch and he said he will review these PRs today as well.

[jadchaar]

Overall a brilliant PR. I need to look at your logic a bit more, but I had a bit of feedback off the bat: I would add a bit of documentation explaining and showing examples for your new feature here: https://github.com/crsmithdev/arrow/blob/master/docs/index.rst.

[jadchaar]

@hwillard98 thanks for the quick updates. Mind adding a section to the main documentation (you should add it to this file: https://github.com/crsmithdev/arrow/blob/master/docs/index.rst)?

It should go in the Humanize section: https://arrow.readthedocs.io/en/latest/#humanize

[hwillard98]

Any other changes requested? I added the documentation in the most recent commit amend

[systemcatch]

Hey @hwillard98, I only have one extra comment which is really a style preference, feel free to deal with it however you want.

Otherwise I think this PR is great and ready to go. @jadchaar any further comments?

[jadchaar]

Thanks for making the changes we commented on previously. I got some time to look at this closer and I had a few remaining comments. Should be good to merge after these are addressed.

[jadchaar]

Looks good to me! Thanks for implementing the feedback quickly 👍 .