[PIN] Force numpy>=1.15.4 when Python>=3.7

[oesteban]

Addresses the numpy
bug.

Summary

Fixes # .

List of changes proposed in this PR (pull-request)

Acknowledgment

• (Mandatory) I acknowledge that this contribution will be available under the Apache 2 license.

[codecov-io]

Codecov Report

Merging #2775 into master will decrease coverage by 2.9%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #2775      +/-   ##
=========================================
- Coverage      67%   64.1%   -2.91%     
=========================================
  Files         340     338       -2     
  Lines       43271   43220      -51     
  Branches     5364    5361       -3     
=========================================
- Hits        28995   27705    -1290     
- Misses      13548   14446     +898     
- Partials      728    1069     +341

Flag	Coverage Δ
#smoketests	?
#unittests	64.1% <100%> (-0.24%)	⬇️

Impacted Files	Coverage Δ
nipype/info.py	88.05% <100%> (+2.98%)	⬆️
nipype/interfaces/nilearn.py	40% <0%> (-56.67%)	⬇️
nipype/utils/spm_docs.py	25.92% <0%> (-44.45%)	⬇️
nipype/algorithms/rapidart.py	35.39% <0%> (-29.21%)	⬇️
nipype/utils/provenance.py	55.73% <0%> (-28.99%)	⬇️
nipype/utils/logger.py	59.7% <0%> (-28.36%)	⬇️
nipype/interfaces/spm/base.py	58.41% <0%> (-25.75%)	⬇️
nipype/interfaces/fsl/model.py	55.26% <0%> (-25.17%)	⬇️
nipype/interfaces/freesurfer/base.py	49.59% <0%> (-23.58%)	⬇️
nipype/testing/fixtures.py	77.33% <0%> (-21.34%)	⬇️
... and 54 more

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[satra]

@mgxd - just a note that we should adjust the conda feedstock for this as well.

[effigies]

I think this will work for sdist, but not bdist. To encode this requirement in the actual package metadata, I think we'll need to use PEP 508 syntax. e.g.

numpy >= 1.9.1
numpy >= 1.15.3 ; python_version >= "3.7"

(That may not work.)

@satra Conda doesn't seem to work well with 3.7 yet. There's an open PR (conda-forge/nipype-feedstock#28) that tries to update to support 3.7 that hasn't yet passed tests.