Adding support for HEAD method query params binding.

[clems71]

Adding support for HEAD method query params binding.

Fixes #2026

[lammel]

As HEAD requests are used to retrieve headers for GET request, param binding should work the same way as with GET.
The comment for this section should be improved though.

@aldas Any objections?

[aldas]

@lammel seems fine by me. I have no objections.

[codecov]

Codecov Report

Merging #2027 (3a893a8) into master (4b88e25) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2027   +/-   ##
=======================================
  Coverage   91.23%   91.23%           
=======================================
  Files          33       33           
  Lines        2887     2888    +1     
=======================================
+ Hits         2634     2635    +1     
  Misses        161      161           
  Partials       92       92           

Impacted Files	Coverage Δ
middleware/rate_limiter.go	100.00% <ø> (ø)
bind.go	89.47% <100.00%> (+0.06%)	⬆️

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[lammel]

@clems71 I've updated the code comment for Bind.
Could you please add a test for HEAD to behave identical to GET, just to ensure this behavior is tested with future releases.

We will merge the branch then.