bump deps to use forked termbox which doesn't crash as easily

vendor/github.com/jesseduffield/gocui/attribute.go

@@ -4,7 +4,7 @@
 
 package gocui
 
-import "github.com/nsf/termbox-go"
+import "github.com/jesseduffield/termbox-go"
 
 // Attribute represents a terminal attribute, like color, font style, etc. They
 // can be combined using bitwise OR (|). Note that it is not possible to

vendor/github.com/jesseduffield/gocui/gui.go

@@ -7,7 +7,7 @@ package gocui
 import (
 	"errors"
 
-	"github.com/nsf/termbox-go"
+	"github.com/jesseduffield/termbox-go"
 )
 
 var (

vendor/github.com/jesseduffield/gocui/keybinding.go

@@ -4,7 +4,7 @@
 
 package gocui
 
-import "github.com/nsf/termbox-go"
+import "github.com/jesseduffield/termbox-go"
 
 // Keybidings are used to link a given key-press event with a handler.
 type keybinding struct {

vendor/github.com/jesseduffield/gocui/view.go

@@ -10,8 +10,8 @@ import (
 	"io"
 	"strings"
 
+	"github.com/jesseduffield/termbox-go"
 	"github.com/mattn/go-runewidth"
-	"github.com/nsf/termbox-go"
 )
 
 // Constants for overlapping edges
@@ -447,6 +447,10 @@ func (v *View) ViewBufferLines() []string {
 	return lines
 }
 
+func (v *View) ViewLinesHeight() int {
+	return len(v.viewLines)
+}
+
 // ViewBuffer returns a string with the contents of the view's buffer that is
 // shown to the user.
 func (v *View) ViewBuffer() string {

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

@@ -317,6 +317,9 @@ func PollEvent() Event {
 	event.Type = EventKey
 	status := extract_event(inbuf, &event, true)
 	if event.N != 0 {
+		if event.N > len(inbuf) {
+			event.N = len(inbuf)
+		}
 		copy(inbuf, inbuf[event.N:])
 		inbuf = inbuf[:len(inbuf)-event.N]
 	}
@@ -345,6 +348,9 @@ func PollEvent() Event {
 			input_comm <- ev
 			status := extract_event(inbuf, &event, true)
 			if event.N != 0 {
+				if event.N > len(inbuf) {
+					event.N = len(inbuf)
+				}
 				copy(inbuf, inbuf[event.N:])
 				inbuf = inbuf[:len(inbuf)-event.N]
 			}
@@ -359,6 +365,9 @@ func PollEvent() Event {
 
 			status := extract_event(inbuf, &event, false)
 			if event.N != 0 {
+				if event.N > len(inbuf) {
+					event.N = len(inbuf)
+				}
 				copy(inbuf, inbuf[event.N:])
 				inbuf = inbuf[:len(inbuf)-event.N]
 			}