update vendor

vendor/github.com/atomicgo/cursor/cursor.go

@@ -0,0 +1,59 @@
+// +build !windows
+
+package cursor
+
+import (
+	"fmt"
+)
+
+// Up moves the cursor n lines up relative to the current position.
+func Up(n int) {
+	fmt.Printf("\x1b[%dA", n)
+	height += n
+}
+
+// Down moves the cursor n lines down relative to the current position.
+func Down(n int) {
+	fmt.Printf("\x1b[%dB", n)
+	if height-n <= 0 {
+		height = 0
+	} else {
+		height -= n
+	}
+}
+
+// Right moves the cursor n characters to the right relative to the current position.
+func Right(n int) {
+	fmt.Printf("\x1b[%dC", n)
+}
+
+// Left moves the cursor n characters to the left relative to the current position.
+func Left(n int) {
+	fmt.Printf("\x1b[%dD", n)
+}
+
+// HorizontalAbsolute moves the cursor to n horizontally.
+// The position n is absolute to the start of the line.
+func HorizontalAbsolute(n int) {
+	n += 1 // Moves the line to the character after n
+	fmt.Printf("\x1b[%dG", n)
+}
+
+// Show the cursor if it was hidden previously.
+// Don't forget to show the cursor at least at the end of your application.
+// Otherwise the user might have a terminal with a permanently hidden cursor, until he reopens the terminal.
+func Show() {
+	fmt.Print("\x1b[?25h")
+}
+
+// Hide the cursor.
+// Don't forget to show the cursor at least at the end of your application with Show.
+// Otherwise the user might have a terminal with a permanently hidden cursor, until he reopens the terminal.
+func Hide() {
+	fmt.Print("\x1b[?25l")
+}
+
+// ClearLine clears the current line and moves the cursor to it's start position.
+func ClearLine() {
+	fmt.Print("\x1b[2K")
+}