Attach generated request-id to request headers

[pscheid92]

See Issue #27.

[appleboy]

@pscheid92 Please update the PR base on https://github.com/gin-contrib/requestid/pull/29/files

[codecov-commenter]

Codecov Report

Merging #28 (6a97060) into master (1a81880) will increase coverage by 0.15%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #28      +/-   ##
==========================================
+ Coverage   94.28%   94.44%   +0.15%     
==========================================
  Files           2        2              
  Lines          35       36       +1     
==========================================
+ Hits           33       34       +1     
  Misses          2        2              

Flag	Coverage Δ
go-	94.44% <100.00%> (+0.15%)	⬆️
go-1.14	94.44% <100.00%> (+0.15%)	⬆️
go-1.15	94.44% <100.00%> (+0.15%)	⬆️
go-1.16	94.44% <100.00%> (+0.15%)	⬆️
go-1.17	94.44% <100.00%> (+0.15%)	⬆️
go-1.18	94.44% <100.00%> (+0.15%)	⬆️
go-1.19	94.44% <100.00%> (+0.15%)	⬆️
macos-latest	94.44% <100.00%> (+0.15%)	⬆️
ubuntu-latest	94.44% <100.00%> (+0.15%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
requestid.go	91.66% <100.00%> (+0.36%)	⬆️

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[pscheid92]

@appleboy I created a new PR here #30

I somehow accidentally broke my fork and closed this PR (also accidentally) while I tried to fix it. 🙈

Today I Learned
Never open a pull request from masterto master. Always use a feature branch.