[REMOVE] Support for Python 3.8 and Python 3.9

[ppfeufer]

Description

Removed

• Support for Python 3.8 and Python 3.9

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have checked my code and corrected any misspellings

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.66%. Comparing base (95f9c23) to head (41909ce).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #209      +/-   ##
==========================================
- Coverage   76.69%   76.66%   -0.03%     
==========================================
  Files          15       15              
  Lines         622      621       -1     
  Branches       60      132      +72     
==========================================
- Hits          477      476       -1     
  Misses        132      132              
  Partials       13       13              

Files	Coverage Δ
fleetpings/admin.py	74.39% <100.00%> (-0.20%)	⬇️

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