More helpful error logging on Invalid data format

[dblythy]

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New Pull Request Checklist

• [x] I am not disclosing a vulnerability.
• [x] I am creating this PR in reference to an issue.

Issue Description

Decoding errors from "error decoding parse server response" can be quite tricky as the error log doesn't provide anything helpful.

Let's say you have a struct with the key firstName as Int, and Parse Server sends a firstName as string.

The error you will get is:

The data couldn’t be read because it isn’t in the correct format, which isn't very helpful.

Related issue: n/a

Approach

This PR changes the error to print:

typeMismatch(Swift.Int, Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "firstName", intValue: nil)], debugDescription: "Expected to decode Int but found a string/data instead.", underlyingError: nil))

TODOs before merging

• [ ] Add tests
• [ ] Add entry to changelog
• [ ] Add changes to documentation (guides, repository pages, in-code descriptions)

[parse-github-assistant[bot]]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[codecov[bot]]

Codecov Report

Merging #388 (60728ba) into main (0c5d7f6) will increase coverage by 0.02%. The diff coverage is 33.33%.

@@            Coverage Diff             @@
##             main     #388      +/-   ##
==========================================
+ Coverage   89.14%   89.16%   +0.02%     
==========================================
  Files         156      156              
  Lines       14528    14528              
==========================================
+ Hits        12951    12954       +3     
+ Misses       1577     1574       -3     

Impacted Files	Coverage Δ
Sources/ParseSwift/Extensions/URLSession.swift	77.16% <33.33%> (ø)
Sources/ParseSwift/Objects/ParseUser.swift	86.12% <0.00%> (-0.09%)	:arrow_down:
Sources/ParseSwift/LiveQuery/ParseLiveQuery.swift	76.75% <0.00%> (+0.58%)	:arrow_up:

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[cbaker6]

Is this ready for review?

[dblythy]

Yep!