🐛 fix bug parse custom header

[huykn]

Description

in func equalFieldType of file ctx.go using fixed tag queryTag if we using func ReqHeaderParser return invalid.

ex:

type Header struct {
  ID      int      `reqHeader:"id"`
  Name    string   `reqHeader:"name"`
  Hobby   []string `reqHeader:"hobby"`
  Address []string `reqHeader:"x-secure-address"`
}
c.Request().SetBody([]byte(``))
c.Request().Header.SetContentType("")

c.Request().Header.Add("id", "1")
c.Request().Header.Add("Name", "John Doe")
c.Request().Header.Add("Hobby", "golang,fiber")
c.Request().Header.Add("x-secure-address", "1st,2st")
q := new(Header)
utils.AssertEqual(t, nil, c.ReqHeaderParser(q))
utils.AssertEqual(t, 2, len(q.Hobby))
utils.AssertEqual(t, 2, len(q.Address)) // failed in this case

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• For new functionalities I follow the inspiration of the express js framework and built them similar in usage
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation - /docs/ directory for https://docs.gofiber.io/
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• If new dependencies exist, I have checked that they are really necessary and agreed with the maintainers/community (we want to have as few dependencies as possible)
• I tried to make my code as fast as possible with as few allocations as possible
• For new code I have written benchmarks so that they can be analyzed and improved

Commit formatting:

Use emojis on commit messages so it provides an easy way of identifying the purpose or intention of a commit. Check out the emoji cheatsheet here: https://gitmoji.carloscuesta.me/

[welcome]

Thanks for opening this pull request! 🎉 Please check out our contributing guidelines. If you need help or want to chat with us, join us on Discord https://gofiber.io/discord

[ReneWerner87]

@huykn pls fix the golangci hints

[huykn]

@huykn pls fix the golangci hints

ready to merge!

[welcome]

Congrats on merging your first pull request! 🎉 We here at Fiber are proud of you! If you need help or want to chat with us, join us on Discord https://gofiber.io/discord