feat: added strategy support for validating status code

[philprime]

No description provided.

[github-actions]

	Warnings
⚠️	Pull Request size seems relatively large. If this Pull Request contains multiple changes, please split each into separate PR will helps faster, easier review.

SwiftLint found issues

Severity	File	Reason
Warning	HTTPStatusCodeTests.swift:1	SwiftLint rule 'type_body_length' did not trigger a violation in the disabled region. Please remove the disable command. (superfluous_disable_command)

Generated by 🚫 Danger Swift against eafa1d8

[codecov-commenter]

Codecov Report

Merging #35 (eafa1d8) into main (bd71eea) will increase coverage by 0.74%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
+ Coverage   56.55%   57.30%   +0.74%     
==========================================
  Files          53       54       +1     
  Lines        1517     1541      +24     
==========================================
+ Hits          858      883      +25     
+ Misses        659      658       -1     

Flag	Coverage Δ
unittests	57.30% <75.00%> (+0.74%)	⬆️

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

Files Changed	Coverage Δ
Sources/Postie/HTTPAPIClient.swift	50.78% <ø> (ø)
...es/Postie/Utils/LoggingURLEncodedFormDecoder.swift	28.57% <0.00%> (-21.43%)	⬇️
Sources/PostieMock/URLSessionCallbackStub.swift	44.44% <ø> (ø)
...Postie/Encoder/RequestKeyedEncodingContainer.swift	58.18% <33.33%> (ø)
...ostie/Decoder/ResponseKeyedDecodingContainer.swift	45.45% <60.00%> (+3.51%)	⬆️
...s/ResponseErrorBody/ResponseErrorBodyWrapper.swift	82.35% <82.35%> (ø)
...e/Responses/ResponseBody/ResponseBodyWrapper.swift	86.36% <100.00%> (+10.17%)	⬆️
...s/Postie/Strategies/Body/DefaultBodyStrategy.swift	100.00% <100.00%> (ø)
...tie/Strategies/Body/DefaultErrorBodyStrategy.swift	100.00% <100.00%> (ø)
...stie/Strategies/Body/OptionalContentStrategy.swift	100.00% <100.00%> (ø)
... and 1 more

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