add income to SMI ratio variable

[tolaouk]

No description provided.

[codecov]

Codecov Report

Merging #383 (1163609) into master (115959e) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #383      +/-   ##
==========================================
+ Coverage   95.01%   95.05%   +0.04%     
==========================================
  Files          59       60       +1     
  Lines        3668     3703      +35     
  Branches      480      483       +3     
==========================================
+ Hits         3485     3520      +35     
  Misses        158      158              
  Partials       25       25              

Impacted Files	Coverage Δ
openfisca_us/variables/hhs/tanf.py	100.00% <ø> (ø)
openfisca_us/variables/demographic/household.py	99.51% <100.00%> (+0.01%)	⬆️
openfisca_us/variables/demographic/spm_unit.py	97.05% <100.00%> (ø)
openfisca_us/variables/hhs/ccdf.py	100.00% <100.00%> (ø)
openfisca_us/variables/hhs/hhs_smi.py	100.00% <100.00%> (ø)

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[MaxGhenis]

These should get the test passing

[MaxGhenis]

Could you resolve the other conversations if they've been addressed too? Then I think we can merge.

[MaxGhenis]

Sorry, now this needs a version bump and changelog entry. It's not showing in the actions because it was recently added, but it would fail the new checks.

[nikhilwoodruff]

Thanks @tolaouk - looks good to merge!