adds iam-units to dependency check

[gidden]

Small hotfix building on #531 which adds a bit of documentation to setup.py and includes iam-units in dependencies which are kept up to date in the new workflow.

[codecov[bot]]

Codecov Report

Merging #540 (1954d94) into main (58e2c95) will not change coverage. The diff coverage is n/a.

@@          Coverage Diff          @@
##            main    #540   +/-   ##
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  Coverage   93.5%   93.5%           
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  Files         47      47           
  Lines       5129    5129           
=====================================
  Hits        4796    4796           
  Misses       333     333           

Impacted Files	Coverage Δ
setup.py	0.0% <ø> (ø)

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[danielhuppmann]

Oh, seems that the explicit iam-units version actually doesn't work...?

[danielhuppmann]

Seems that support for CO2e was added with https://github.com/IAMconsortium/units/pull/21, with the corresponding release on 2020.4.21

[gidden]

Added the commits - let's see how the pipelines work out. Appears the test is already working, though =)

[danielhuppmann]

Thanks @gidden