Fix compile errors for Swift 6 language mode

[b1ackturtle]

This PR fixes code that caused compile errors when enabling the Swift 6 language mode.

Checklist

• I've added at least one test that validates that my change is working, if appropriate
• I've followed the code style of the rest of the project
• I've read the Contribution Guidelines
• I've updated the documentation if necessary

[natecook1000]

Thanks so much for this, @b1ackturtle — just one set of changes and we can merge this.

[natecook1000]

Could we resolve these warnings in this way instead? The #filePath attribute was introduced in Swift 5.8, but we're going to support back to Swift 5.7 in the next release of this package.

Suggested change

	file: StaticString = #filePath, line: UInt = #line
	file: StaticString = (#file), line: UInt = #line

[b1ackturtle]

Thank you for your review. I have updated my code based on your suggestion.

[glessard]

@swift-ci please test

[ankushkushwaha]

Can you please explain, why do we need this final keyword here?

[b1ackturtle]

It was added to resolve the following error:
Non-final class 'SampleError' cannot conform to 'Sendable'; use @unchecked Sendable

[ankushkushwaha]

Thanks for explanation. Can you please also update you branch with base branch?

[natecook1000]

@swift-ci Please test

[natecook1000]

@swift-ci Please test