Add openpyxl to environment file

[milinddethe15]

fixes #2702

[jdebacker]

Thanks of the PR @milinddethe15!

[jdebacker]

@milinddethe15 Can you add openpyxl to the list of dependencies used to build the package in Tax-Calculator/conda.recipe/meta.yaml?

I think with that, all tests should pass.

[jdebacker]

I'm sorry - one more time @milinddethe15 - the openpyxl dependency will need to be listed in the run list also in meta.yml

[codecov]

Codecov Report

Merging #2703 (838641d) into master (4c54366) will not change coverage.
Report is 9 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2703   +/-   ##
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  Coverage   98.54%   98.54%           
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  Files          14       14           
  Lines        2609     2609           
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  Hits         2571     2571           
  Misses         38       38           

Flag	Coverage Δ
unittests	98.54% <ø> (ø)

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[jdebacker]

@milinddethe15 Thank you for this PR! Merging.