fix: remove decimals in header timings

[shaunwarman]

Before:
1590471270.087

After:
1590471270

[codecov]

Codecov Report

Merging #188 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #188   +/-   ##
=======================================
  Coverage   90.62%   90.62%           
=======================================
  Files           1        1           
  Lines          64       64           
  Branches       16       16           
=======================================
  Hits           58       58           
  Misses          6        6           

Impacted Files	Coverage Δ
src/index.ts	90.62% <100.00%> (ø)

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[scttcper]

makes sense, thanks!

[scttcper]

🎉 This PR is included in version 4.0.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[niftylettuce]

Kickass @shaunwarman and @scttcper thank you.

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