Getting crash on Xcode 16 using Swift 6

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## What did you do?

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## What did you expect to happen?

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## What happened instead?

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## DGCharts Environment

**DGCharts version/Branch/Commit Number:**
**Xcode version:**
**Swift version:**
**Platform(s) running DGCharts:**
**macOS version running Xcode:**

## Demo Project

ℹ Please link to or upload a project we can download that reproduces the issue.

The report does not identify a source file, test, entry point, reproduction steps, expected behavior, actual behavior, or demo project. Start by obtaining those details and reproducing the crash with Xcode 16 and Swift 6; the issue is complete only when the crash has a verified fix and regression coverage.

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