Use aiohttp only for both async and sync contexts

[aaront]

Implement session management
Remove requests and urllib3 dependencies

[codecov-commenter]

Codecov Report

❌ Patch coverage is 80.74074% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.41%. Comparing base (f44a24e) to head (4be14f8).

Files with missing lines	Patch %	Lines
mygeotab/http.py	73.77%	10 Missing and 6 partials ⚠️
mygeotab/api.py	91.42%	3 Missing and 3 partials ⚠️
mygeotab/altitude/wrapper.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #182      +/-   ##
==========================================
+ Coverage   55.21%   56.41%   +1.20%     
==========================================
  Files           9        9              
  Lines         547      546       -1     
  Branches       89       84       -5     
==========================================
+ Hits          302      308       +6     
+ Misses        223      218       -5     
+ Partials       22       20       -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.