fix(latest-version,deployed-version,webhook): respect proxy env vars in requests

[JosephKav]

Clone the default transport, ensuring proxy environment variables are respected (HTTP_PROXY, HTTPS_PROXY and NO_PROXY)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.82%. Comparing base (8083828) to head (11da8f9).
⚠️ Report is 16 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #699      +/-   ##
==========================================
- Coverage   98.82%   98.82%   -0.00%     
==========================================
  Files         132      132              
  Lines        8894     8891       -3     
==========================================
- Hits         8789     8786       -3     
  Misses         80       80              
  Partials       25       25              

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