Change tests suite

[CleitonDeLima]

• Remove support python 3.7
• Remove support django <3.2
• Update dependabot
• Remove tox tests

[codecov-commenter]

Codecov Report

Merging #89 (4ae5d3d) into master (93c208d) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #89   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines           38        38           
  Branches         7         7           
=========================================
  Hits            38        38           

Flag	Coverage Δ
py3.10	100.00% <ø> (ø)
py3.6	?
py3.7	?
py3.8	100.00% <ø> (ø)
py3.9	100.00% <ø> (?)

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