try osx/win ci

[bollwyvl]

Modifications:

• adds tests of as-built wheels across a matrix of {os x python x scipy x numpy}

Impacted submodules:

• ???

This pull request:

(your PR must match these criteria before review)

• [x] targets the develop branch
• [ ] does not decrease code coverage
• [ ] passes the tests
• [ ] is documented and the documentation build passes
• [ ] has PEP8-compliant code and explicit variable naming
• [ ] has a tutorial (facultative but recommended)

Any doubts about some technicalities? Do not hesitate to look at the dedicated Wiki.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.62%. Comparing base (2cb2798) to head (7164e58).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #577 +/- ## ======================================== Coverage 97.62% 97.62% ======================================== Files 182 182 Lines 8184 8184 ======================================== Hits 7990 7990 Misses 194 194 ```

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[tbonald]

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