refactor: Optimizing access to header values in default request

[winie]

When iterating over header values with array functions, the header values are passed directly to the array function.

[vercel]

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Name	Status	Preview	Updated
upload	✅ Ready (Inspect)	Visit Preview	Jul 31, 2022 at 8:56PM (UTC)

[afc163]

Could you provide reproduce and add a test case for it?

[codecov]

Codecov Report

Merging #430 (89dd2b3) into master (0d0ca2f) will decrease coverage by 0.06%.
The diff coverage is 100.00%.

❗ Current head 89dd2b3 differs from pull request most recent head 6be7fba. Consider uploading reports for the commit 6be7fba to get more accurate results

@@ Coverage Diff @@## master #430 +/- ##
==========================================
- Coverage 84.92% 84.86% -0.07% 
==========================================
Files 6 6 Lines 252 251 -1 Branches 63 59 -4 ==========================================
- Hits 214 213 -1 
Misses 38 38 

Impacted Files	Coverage Δ
src/request.ts	96.07% <100.00%> (-0.08%)	⬇️

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[winie]

Could you provide reproduce and add a test case for it?

The behaviour of the component has not changed. I only replaced the for-loops in the request.ts with more modern iterations. Therefore, the previous tests should be sufficient.

If you mean the 0.07% lost percentage of test coverage:
This is because there are fewer lines of code and the 2 lines that were not tested before are now more important.
https://app.codecov.io/gh/react-component/upload/compare/430/tree/src/request.ts