DEP: bump numpy min version?

[jbrockmendel]

We currently require 1.13.3 which was released 2017-09-29. The last bump was in 0.25.0 (#25554).

I think its time for another bump. The release dates for the 1.x.0 and 1.x.MAX versions out there:

1.14.0 -> 2018-01-06
1.14.6 -> 2018-09-23
1.15.0 -> 2018-07-23
1.15.4 -> 2018-11-04
1.16.0 -> 2019-01-13
1.16.6 -> 2019-12-29
1.17.0 -> 2019-07-06
1.17.5 -> 2020-01-01

1.15.4 looks not-unreasonable to me.

[jreback]

+1 in bumping to 1.15.x

even 1.16.x is ok

[TomAugspurger]

According to https://numpy.org/neps/nep-0029-deprecation_policy.html#drop-schedule, NumPy 1.14 can / should be dropped after

On Jan 07, 2020 drop support for Numpy 1.14 (initially released on Jan 06, 2018)

[jorisvandenbossche]

I would also follow NEP29, which means np 1.14 for pandas 1.1 (and then can probably go to np 1.15 after pandas 1.1 is released)

[TomAugspurger]

@jorisvandenbossche doesn't NEP29 say we're already supposed to drop 1.14, since it's the next release after January 7, 2020?

[jorisvandenbossche]

Whoops, sorry, yes I should have said 1.15 and 1.16, instead of 1.14 and 1.15