Make dependencies less strict

[lazyoracle]

What

Makes dependency requirements flexible

Why

Fixes #97

How

• Less strict requirements with >=
• test/test_envelopes.py has been updated to include a variable atol which is calculated based on the desired data. This was outlined in Further tests and reading loading config checks #89 and the same has been adopted here after some refactoring to allow for easy updating and maintenance.

[lazyoracle]

@GlaserN Do you have any insights on what might have led to the following test fail?

test/test_envelopes.py:262: in <module>
    test_gaussian()
test/test_envelopes.py:190: in test_gaussian
    actual=envelopes["gaussian"](t=ts, params=params), desired=test_data["gaussian"]
E   AssertionError: 
E   Not equal to tolerance rtol=1e-07, atol=0
E   
E   Mismatched elements: 2 / 100 (2%)
E   Max absolute difference: 6.51925802e-09
E   Max relative difference: 1.33211993e-15
E    x: array([2.566574e-09, 5.401866e+05, 1.172500e+06, 1.909621e+06,
E          2.765382e+06, 3.754771e+06, 4.893897e+06, 6.199942e+06,
E          7.691067e+06, 9.386301e+06, 1.130537e+07, 1.346853e+07,...
E    y: array([0.000000e+00, 5.401866e+05, 1.172500e+06, 1.909621e+06,
E          2.765382e+06, 3.754771e+06, 4.893897e+06, 6.199942e+06,
E          7.691067e+06, 9.386301e+06, 1.130537e+07, 1.346853e+07,...

We have only made the requirements of dependencies less strict by allowing upgrades to the latest version of tensorflow. There s no API breaking changes with tensorflow that affects us and if we were relying on some specific/weird aspects of the tensorflow implementations, this might be a good time to revisit it because we definitely do not wish to restrict our dependencies to a particular release.

[GlaserN]

I guess the rtol or atol of this test has to be adjusted. The 2 mismatched elements are 1e-15 smaller than all the other elements meaning that we seem to have some numerical artefacts happening here.

[codecov]

Codecov Report

Merging #95 (6cf6c1d) into dev (6ee8d75) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev      #95   +/-   ##
=======================================
  Coverage   65.28%   65.28%           
=======================================
  Files          36       36           
  Lines        5292     5292           
=======================================
  Hits         3455     3455           
  Misses       1837     1837           

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