SOAP support for NFe

[rvalyi]

WIP

based on #124

[codecov]

Codecov Report

Attention: Patch coverage is 62.02532% with 90 lines in your changes missing coverage. Please review.

Project coverage is 78.04%. Comparing base (c52971a) to head (c4266b1).

Files with missing lines	Patch %	Lines
tests/nfe/test_client.py	56.52%	86 Missing and 4 partials ⚠️

❗ There is a different number of reports uploaded between BASE (c52971a) and HEAD (c4266b1). Click for more details.

HEAD has 19 uploads less than BASE

Flag	BASE (c52971a)	HEAD (c4266b1)
	24	5

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #125       +/-   ##
===========================================
- Coverage   91.40%   78.04%   -13.37%     
===========================================
  Files           7       10        +3     
  Lines         291      492      +201     
  Branches       30       39        +9     
===========================================
+ Hits          266      384      +118     
- Misses         13       95       +82     
- Partials       12       13        +1     

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