Upgrade numpy to 1.16.6 (last release supporting py2) to fix numpy build error on local-conda-forge-macos-standard

[mkoeppe]

numpy build fails on macOS with conda-forge (https://github.com/mkoeppe/sage/runs/542501526)

Traceback (most recent call last):
  File "numpy/core/setup_common.py", line 241, in check_long_double_representation
    ltype = long_double_representation(pyod(obj))
  File "numpy/core/setup_common.py", line 401, in long_double_representation
    raise ValueError("Could not lock sequences (%s)" % saw)
ValueError: Could not lock sequences (None)

This comes from the depth of NumPy's code that tries to determine ABI by inspecting some compiled code (https://github.com/numpy/numpy/blob/master/numpy/core/setup_common.py).

An upgrade to 1.16.6 fixes the build error and works well on other platforms.

This can be tested with #29415:

  tox -e local-conda-forge-macos-standard

Follow-up: #29425 - newer version, py3 only

CC: @isuruf @dimpase @kiwifb @embray

Component: packages: standard

Author: Matthias Koeppe

Branch/Commit: b0c7df6

Reviewer: Isuru Fernando

Issue created by migration from https://trac.sagemath.org/ticket/29429

[mkoeppe]

Branch: u/mkoeppe/upgrade_numpy_to_0_16_6__last_release_supporting_py2_

[DaveWitteMorris]

Commit: b0c7df6

[DaveWitteMorris]

New commits:

b0c7df6

Update numpy to 1.16.6

[mkoeppe]

comment:3

Thanks - off by one

[mkoeppe]

comment:4

Tests run at https://github.com/mkoeppe/sage/actions/runs/66814284, in particular to check whether this update fixes the problem reported on #29425

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

comment:7

Ready for review

[isuruf]

Reviewer: Isuru Fernando

[mkoeppe]

comment:9

Thanks!

[mkoeppe]

comment:10

This seems to cause matplotlib build to fail on Cygwin - https://github.com/mkoeppe/sage/runs/550935268

[mkoeppe]

comment:11

Trying if a matplotlib update fixes it (#29444)

[mkoeppe]

comment:12

Test running at https://github.com/mkoeppe/sage/actions/runs/68777489

[mkoeppe]

comment:13

Let's worry about Cygwin later. Hopefully the maintainer of the Cygwin port finds some time before the 9.1 release

[vbraun]

Changed branch from u/mkoeppe/upgrade_numpy_to_0_16_6__last_release_supporting_py2_ to b0c7df6