minor fixes for chart ticks min/max

covid.js

@@ -1252,7 +1252,7 @@ let updateChartSettings = () => {
     } else {
         var chart_type_factor = 1.1
     }
-    theChart.options.scales.yAxes[0].ticks.max = max_cases * chart_type_factor
+    theChart.options.scales.yAxes[0].ticks.max = Math.round(max_cases * chart_type_factor)
     
     var chart_start_setting = document.querySelector('input[type=radio][name=chart-start]:checked').value
     if (chart_start_setting === "date") {
@@ -1280,7 +1280,7 @@ let updateChartSettings = () => {
     // showing new confirmed cases / recoveries / deaths / active cases
     // notice: *new active cases* can be *negative!*
     } else {
-        theChart.options.scales.yAxes[0].ticks.min = min_cases * chart_type_factor
+        theChart.options.scales.yAxes[0].ticks.min = Math.round(min_cases * chart_type_factor)
         theChart.options.scales.yAxes[0].scaleLabel.labelString += ", new"
     }