fixes #1125 due to missing aync override

[thehesiod]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 14 lines in your changes missing coverage. Please review.

Project coverage is 86.14%. Comparing base (eae9743) to head (23ef769).
Report is 128 commits behind head on master.

Files with missing lines	Patch %	Lines
aiobotocore/httpchecksum.py	30.00%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1126      +/-   ##
==========================================
- Coverage   86.33%   86.14%   -0.19%     
==========================================
  Files          62       62              
  Lines        5913     5933      +20     
==========================================
+ Hits         5105     5111       +6     
- Misses        808      822      +14     

Flag	Coverage Δ
unittests	86.14% <33.33%> (-0.19%)	⬇️

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[thehesiod]

i added a test but it doesn't seem like moto completely supports it, I tried updating moto but I need to re-architect how the moto service works because apparently now you only need one (yay)

[thehesiod]

did the re-architect, and a ton of tests break due to incompatibilities between botocore/moto

[jakob-keller]

LGTM

[thehesiod]

put the changes in a branch, we can re-visit it later