fix: add timeout event

[fupengl]

xhr did not register for timeout event

[vercel]

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[codecov]

Codecov Report

Merging #295 (93f6199) into master (653a094) will decrease coverage by 0.19%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master     #295      +/-   ##
==========================================
- Coverage   73.96%   73.77%   -0.20%     
==========================================
  Files           6        6              
  Lines         242      244       +2     
  Branches       58       58              
==========================================
+ Hits          179      180       +1     
- Misses         63       64       +1     

Impacted Files	Coverage Δ
src/request.ts	88.88% <50.00%> (-1.50%)	⬇️

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