Found a bug in Demo IOS

[DevanshuBrahmbhatt]

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Charts Environment

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

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[DevanshuBrahmbhatt]

Hello in this Demo File(https://github.com/danielgindi/Charts/blob/master/ChartsDemo-iOS/Swift/Demos/CombinedChartViewController.swift) there is [set1, set2] on line no 179, it is giving me an error of Can't convert in BarchartData type. when I looked at the code definition I found we could not pass the array of the array there. As per my understanding, this is the correct solution for that. "return BarChartData(dataSet: set1) "