refactor: change boolean config params to match Swift

[cbaker6]

New Pull Request Checklist

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

Issue Description

Boolean config parameters should began with is to match standard Swift conventions.

Related issue: #n/a

Approach

Change the relevant config parameters. This is a breaking change, but the compiler should help update the names.

Changes you will need to make to your ParseSwift initialization/configuration:

• deleteKeychainIfNeeded -> isDeletingKeychainIfNeeded
• useTransactions -> isUsingTransactions
• allowCustomObjectId -> isAllowingCustomObjectIds

TODOs before merging

• [x] Add entry to changelog
• [x] 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 #311 (2ee5ab8) into main (6a7f5c7) will increase coverage by 0.07%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #311      +/-   ##
==========================================
+ Coverage   84.59%   84.67%   +0.07%     
==========================================
  Files         114      114              
  Lines       11700    11701       +1     
==========================================
+ Hits         9898     9908      +10     
+ Misses       1802     1793       -9     

Impacted Files	Coverage Δ
...s/ParseSwift/Objects/ParseInstallation+async.swift	100.00% <ø> (ø)
...ParseSwift/Objects/ParseInstallation+combine.swift	92.94% <ø> (ø)
Sources/ParseSwift/Objects/ParseObject+async.swift	100.00% <ø> (ø)
...urces/ParseSwift/Objects/ParseObject+combine.swift	92.94% <ø> (ø)
Sources/ParseSwift/Objects/ParseObject.swift	81.46% <ø> (ø)
Sources/ParseSwift/Objects/ParseUser+async.swift	100.00% <ø> (ø)
Sources/ParseSwift/Objects/ParseUser+combine.swift	95.27% <ø> (ø)
Sources/ParseSwift/API/API+Command.swift	83.80% <100.00%> (+0.03%)	:arrow_up:
Sources/ParseSwift/Coding/ParseEncoder.swift	74.23% <100.00%> (ø)
Sources/ParseSwift/Objects/ParseInstallation.swift	80.66% <100.00%> (ø)
... and 4 more

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