[MRG] Change numpy version (due to ABI change)

[rflamary]

Types of changes

Motivation and context / Related issue

How has this been tested (if it applies)

PR checklist

• I have read the CONTRIBUTING document.
• The documentation is up-to-date with the changes I made (check build artifacts).
• All tests passed, and additional code has been covered with new tests.
• I have added the PR and Issue fix to the RELEASES.md file.

[codecov]

Codecov Report

Merging #326 (528e76e) into master (176c6b4) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #326      +/-   ##
==========================================
+ Coverage   93.03%   93.07%   +0.03%     
==========================================
  Files          21       21              
  Lines        5198     5198              
==========================================
+ Hits         4836     4838       +2     
+ Misses        362      360       -2