OpenFisca-UK integration

[jdebacker]

This PR integrates OpenFisca-UK into oguk_calibration. This microsimulation model will provide the underlying data on marginal and effective tax rates that will go into the UK calibration of the OG model.

[jdebacker]

@nikhilwoodruff Can you look at the testing failures and see if you can identify why the conflict in setting up the environment arises? The issue is described here:

  The conflict is caused by:
1093
      The user requested openfisca-core 35.0.0 (from git+https://github.com/nikhilwoodruff/openfisca-core.git)
1094
      openfisca-uk 0.2.2 depends on openfisca-core 35.0.0 (from git+https://github.com/nikhilwoodruff/openfisca-core)

  ERROR: Cannot install -r /home/runner/work/OG-UK-Calibration/OG-UK-Calibration/condaenv.1lzvviqe.requirements.txt (line 5) and openfisca-core 35.0.0 (from git+https://github.com/nikhilwoodruff/openfisca-core.git) because these package versions have conflicting dependencies.
1128
  ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies

[rickecon]

@jdebacker and @nikhilwoodruff. As @jdebacker notes above, the error states:

The conflict is caused by:
      The user requested openfisca-core 35.0.0 (from git+https://github.com/nikhilwoodruff/openfisca-core.git)
      openfisca-uk 0.2.2 depends on openfisca-core 35.0.0 (from git+https://github.com/nikhilwoodruff/openfisca-core)

  To fix this you could try to:
  1. loosen the range of package versions you've specified
  2. remove package versions to allow pip attempt to solve the dependency conflict

This is going to take some detective work to figure out what the conflict is. It sounds like it is a conflict between some package in our environment.yml and the openfisca-core 35.0.0.

I tried fixing the Python version in environment.yml to python==3.7.7 and removing the ability to accommodate Python 3.8 and 3.9 in setup.py in a PR that I submitted to @jdebacker's branch. But that gave the same error. That PR is now closed and not merged.

[nikhilwoodruff]

Thanks @rickecon and @jdebacker it's possible openfisca-uk has some lack of support (purely because of not specifying different package versions) for Python above 3.7 - I'll have a look and see if I can fix it. Not this - see below

[nikhilwoodruff]

Just changed the openfisca-uk dependency for microdf (pslmodels/... PSLmodels/...) which should at least fix the current error.

[codecov-commenter]

Codecov Report

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[jdebacker]

Thanks @nikhilwoodruff, tests on 3.7 appear to pass now!

[rickecon]

I have reviewed all the changes. This looks good to me. @jdebacker are you ready for me to merge this? Thanks, @nikhilwoodruff for the help.

[jdebacker]

@rickecon Yes, this PR is ready to merge. Thanks for reviewing!