feat(filter): adapt http middleware handler

[ggicci]

Updates #504

[codecov-commenter]

Codecov Report

Merging #505 (7a7ca5e) into v3 (05d5234) will increase coverage by 0.15%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##               v3     #505      +/-   ##
==========================================
+ Coverage   69.64%   69.80%   +0.15%     
==========================================
  Files          27       28       +1     
  Lines        1598     1606       +8     
==========================================
+ Hits         1113     1121       +8     
  Misses        413      413              
  Partials       72       72              

Impacted Files	Coverage Δ
filter_adapter.go	100.00% <100.00%> (ø)

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[emicklei]

Thank you for contributing to this package. I am happy with this extension as it allows using std http handlers.
I will update the README to mention this new feature

[ggicci]

Most welcome :) go-restful is an awesome package.