Revert "⬆️ Bump helm.sh/helm/v3 from 3.3.4 to 3.6.1 (#280)" (#281)

This reverts commit db8e3da01f.

vendor/github.com/moby/term/termios_linux.go

@@ -0,0 +1,39 @@
+package term // import "github.com/moby/term"
+
+import (
+	"golang.org/x/sys/unix"
+)
+
+const (
+	getTermios = unix.TCGETS
+	setTermios = unix.TCSETS
+)
+
+// Termios is the Unix API for terminal I/O.
+type Termios unix.Termios
+
+// MakeRaw put the terminal connected to the given file descriptor into raw
+// mode and returns the previous state of the terminal so that it can be
+// restored.
+func MakeRaw(fd uintptr) (*State, error) {
+	termios, err := unix.IoctlGetTermios(int(fd), getTermios)
+	if err != nil {
+		return nil, err
+	}
+
+	var oldState State
+	oldState.termios = Termios(*termios)
+
+	termios.Iflag &^= (unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON)
+	termios.Oflag &^= unix.OPOST
+	termios.Lflag &^= (unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN)
+	termios.Cflag &^= (unix.CSIZE | unix.PARENB)
+	termios.Cflag |= unix.CS8
+	termios.Cc[unix.VMIN] = 1
+	termios.Cc[unix.VTIME] = 0
+
+	if err := unix.IoctlSetTermios(int(fd), setTermios, termios); err != nil {
+		return nil, err
+	}
+	return &oldState, nil
+}