[11.0][FIX]decode() added to decodestring, limit=1 to xml search method

[carcaroff]

• decode() method added to all decodestring()
• limit=1 to all xml searches, to prevent errors

[codecov-io]

Codecov Report

Merging #470 into 11.0 will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             11.0     #470   +/-   ##
=======================================
  Coverage   61.57%   61.57%           
=======================================
  Files         132      132           
  Lines        6935     6935           
=======================================
  Hits         4270     4270           
  Misses       2665     2665

Impacted Files	Coverage Δ
br_nfe/models/invoice_eletronic.py	75.6% <ø> (ø)	⬆️

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