Improve reliability of reload

[Dreamsorcerer]

No description provided.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (859687f) 91.28% compared to head (f315c58) 91.20%.
Report is 6 commits behind head on master.

Files	Patch %	Lines
aiohttp_devtools/runserver/watch.py	83.33%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #631      +/-   ##
==========================================
- Coverage   91.28%   91.20%   -0.09%     
==========================================
  Files          12       12              
  Lines         815      830      +15     
  Branches      140      143       +3     
==========================================
+ Hits          744      757      +13     
  Misses         47       47              
- Partials       24       26       +2     

Flag	Coverage Δ
unit	91.08% <88.88%> (-0.09%)	⬇️

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