Blank space should not exist in BarChartView

[anchar]

• I've read, understood, and done my best to follow the *CONTRIBUTING guidelines.

What did you do?

I create two BarChartView in a storyboard with configure them. But will a blank appear at the bottom of the chart.

        barChartView.drawGridBackgroundEnabled = false 
        barChartView.drawBordersEnabled = false 
        barChartView.drawMarkers = false
        
        
        //barChartView.legend.form = .none
        barChartView.legend.horizontalAlignment = .center
        barChartView.legend.font = UIFont(name: "PingFangSC-Regular", size: 12) ?? UIFont.systemFont(ofSize: 12)
        barChartView.legend.textColor = UIColor("#6C6C6C")
        barChartView.legend.formSize = 0
        barChartView.legend.formToTextSpace = 0
        
        barChartView.xAxis.labelPosition = .bottom
        barChartView.xAxis.drawGridLinesEnabled = false
        //barChartView.xAxis.enabled = false
        
        barChartView.leftAxis.enabled = false
        barChartView.rightAxis.enabled = false
        
        if let noDataFont = UIFont(name: "PingFangSC-Regular", size: 15) {
            barChartView.noDataFont = noDataFont
        }
        barChartView.noDataTextColor = UIColor("#6C6C6C")
        barChartView.noDataTextAlignment = .center

        var dataEntries = [BarChartDataEntry]()
        for i in 0..<3 {
            let entry = BarChartDataEntry(x: Double(i), y: Double(i))
            dataEntries.append(entry)}
        barChartView.xAxis.valueFormatter = IndexAxisValueFormatter(values: [])
       
        let chartDataSet = BarChartDataSet(entries: dataEntries, label: text)
        chartDataSet.colors = [.red, . blue, .green]
        chartDataSet.valueColors = chartDataSet.colors
        chartDataSet.valueFont = UIFont(name: "PingFangSC-Regular", size: 10) ?? UIFont.systemFont(ofSize: 10)
        
        let chartData = BarChartData(dataSets: [chartDataSet])
        chartData.barWidth = 0.5
        
        barChartView.data = chartData

What did you expect to happen?

What happened instead?

If y of BarChartDataEntry is 0

Charts Environment

**Charts version/Branch/Commit Number: iOS-Charts 3.3.0
**Xcode version: Xcode 10.3
**Swift version: Swift 4.3
**Platform(s) running Charts: iOS 12.4.6
**macOS version running Xcode: macOS Mojave 10.14.6

Demo Project

[anchar]

This question need set barChartView.leftAxis.axisMinimum and barChartView.leftAxis.axisMaximum.

barChartView.leftAxis.axisMinimum = 0
barChartView.leftAxis.axisMaximum = 100

Please read issue#3650.