Yaxis annotations at the very top edge of the graph are displayed at the wrong y-coordinate

[aneas]

Description

This only happens when the top edge of the annotation is positioned at the y-coordinate 0.

The bug is caused by a wrong null-check in

apexcharts.js/src/modules/annotations/YAxisAnnotations.js

Line 66 in 318bc91

y: (y2 || y1) + anno.label.offsetY - 3,

If y2 is null, then y2 || y1 is correct. If y2 is 0, however, then y1 is wrongly used instead.

Steps to Reproduce

<script src="https://cdn.jsdelivr.net/npm/apexcharts"></script>
<div id="chart"></div>
<script>
    let chart = new ApexCharts(document.querySelector("#chart"), {
        chart: {
            type: 'line',
            width: 300,
            height: 200,
            toolbar: { show: false }
        },
        series: [{
            data: [0, 1]
        }],
        annotations: {
            yaxis: [
                {
                    y: 0.0,
                    y2: 0.5,
                    label: {
                        text: '0.0 to 0.5',
                        offsetX: -60,
                        style: { background: '#00ff00' }
                    }
                },
                {
                    y: 0.5,
                    y2: 1.0,
                    label: {
                        text: '0.5 to 1.0',
                        style: { background: '#ff0000' }
                    }
                },
                {
                    y: 1.0,
                    y2: 1.01,
                    label: {
                        text: '1.0 to 1.01',
                        style: { background: '#ffff00' }
                    }
                }
            ]
        }
    });

    chart.render();
</script>

Expected Behavior

The green annotation should be at y=0.5, the red one at y=1.0, and the yellow one at y=1.01.

Actual Behavior

The red annotation is placed at y=0.5 instead of y=1.0

Screenshots