docs: fix requirements funcparserlib

[dpgaspar]

Description

fix requirements for funcparserlib: vlasovskikh/funcparserlib#70

error in funcparserlib setup command: use_2to3 is invalid.

ADDITIONAL INFORMATION

• Has associated issue:
• Is CRUD MVC related.
• Is Auth, RBAC security related.
• Changes the security db schema.
• Introduces new feature
• Removes existing feature

[codecov]

Codecov Report

Merging #1703 (3c3c12c) into master (fdf5784) will not change coverage.
The diff coverage is n/a.

❗ Current head 3c3c12c differs from pull request most recent head 3a3603b. Consider uploading reports for the commit 3a3603b to get more accurate results

@@           Coverage Diff           @@
##           master    #1703   +/-   ##
=======================================
  Coverage   76.67%   76.67%           
=======================================
  Files          55       55           
  Lines        8091     8091           
=======================================
  Hits         6204     6204           
  Misses       1887     1887           

Flag	Coverage Δ
python	76.67% <ø> (ø)

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