Update vendor folder (Delve support)

vendor/github.com/peterh/liner/unixmode.go

@@ -0,0 +1,37 @@
+// +build linux darwin freebsd openbsd netbsd
+
+package liner
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func (mode *termios) ApplyMode() error {
+	_, _, errno := syscall.Syscall(syscall.SYS_IOCTL, uintptr(syscall.Stdin), setTermios, uintptr(unsafe.Pointer(mode)))
+
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+// TerminalMode returns the current terminal input mode as an InputModeSetter.
+//
+// This function is provided for convenience, and should
+// not be necessary for most users of liner.
+func TerminalMode() (ModeApplier, error) {
+	mode, errno := getMode(syscall.Stdin)
+
+	if errno != 0 {
+		return nil, errno
+	}
+	return mode, nil
+}
+
+func getMode(handle int) (*termios, syscall.Errno) {
+	var mode termios
+	_, _, errno := syscall.Syscall(syscall.SYS_IOCTL, uintptr(handle), getTermios, uintptr(unsafe.Pointer(&mode)))
+
+	return &mode, errno
+}