如何用goterm绘制图表？

I want to draw a simple chart in the terminal using Go for which I'm trying to use goterm. When I run the example code below (from here) my program finishes without any output. Does anybody know what I might be doing wrong?

package main

import (
    tm "github.com/buger/goterm"
    "math"
)

func main() {
    tm.Clear()
    tm.MoveCursor(0, 0)

    chart := tm.NewLineChart(100, 20)
    data := new(tm.DataTable)
    data.AddColumn("Time")
    data.AddColumn("Sin(x)")
    data.AddColumn("Cos(x+1)")

    for i := 0.1; i < 10; i += 0.1 {
        data.AddRow(i, math.Sin(i), math.Cos(i+1))
    }

    tm.Println(chart.Draw(data))
    tm.Flush()
}