vendor: update all dependencies

vendor/github.com/nsf/termbox-go/README.md

@@ -17,6 +17,7 @@ There are also some interesting projects using termbox-go:
  - [httopd](https://github.com/verdverm/httopd) is top for httpd logs.
  - [mop](https://github.com/mop-tracker/mop) is stock market tracker for hackers.
  - [termui](https://github.com/gizak/termui) is a terminal dashboard.
+ - [termdash](https://github.com/mum4k/termdash) is a terminal dashboard.
  - [termloop](https://github.com/JoelOtter/termloop) is a terminal game engine.
  - [xterm-color-chart](https://github.com/kutuluk/xterm-color-chart) is a XTerm 256 color chart.
  - [gocui](https://github.com/jroimartin/gocui) is a minimalist Go library aimed at creating console user interfaces.

vendor/github.com/nsf/termbox-go/api.go

@@ -24,13 +24,21 @@ import "time"
 func Init() error {
 	var err error
 
-	out, err = os.OpenFile("/dev/tty", syscall.O_WRONLY, 0)
-	if err != nil {
-		return err
-	}
-	in, err = syscall.Open("/dev/tty", syscall.O_RDONLY, 0)
-	if err != nil {
-		return err
+	if runtime.GOOS == "openbsd" {
+		out, err = os.OpenFile("/dev/tty", os.O_RDWR, 0)
+		if err != nil {
+			return err
+		}
+		in = int(out.Fd())
+	} else {
+		out, err = os.OpenFile("/dev/tty", os.O_WRONLY, 0)
+		if err != nil {
+			return err
+		}
+		in, err = syscall.Open("/dev/tty", syscall.O_RDONLY, 0)
+		if err != nil {
+			return err
+		}
 	}
 
 	err = setup_term()