OpenFisca-Core seems to depend on numpy 1.20

[benjello]

Hi there!

I really enjoy OpenFisca, but I recently encountered an issue.

Here is what I did:

I modified openfisca-survey-manager

Here is what I expected to happen:

Nothing new

Here is what actually happened:

Tests not passing

Context

I identify more as a:

• Analyst (I make macroscopic computations on real populations).
• Business expert (I create tests and model legislation).
• Developer (I create tools that use the existing OpenFisca code).

(remove this line as well as all items in the list that don't fit your situation)

[bonjourmauko]

Thanks @benjello ! As discussed already in #1010, forcing users to upgrade to NumPy 1.20.0+ its a non-intended consequence of #990, so clearly a bug IMHO.