Bump gocui

... and switch back from stefanhaller's tcell fork to the official tcell. This
basically reverts 7ccb871a45.

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

@@ -4,7 +4,7 @@
 
 package gocui
 
-import "github.com/stefanhaller/tcell/v2"
+import "github.com/gdamore/tcell/v2"
 
 // Attribute affects the presentation of characters, such as color, boldness, etc.
 type Attribute uint64

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

@@ -12,9 +12,9 @@ import (
 	"sync"
 	"time"
 
+	"github.com/gdamore/tcell/v2"
 	"github.com/go-errors/errors"
 	"github.com/mattn/go-runewidth"
-	"github.com/stefanhaller/tcell/v2"
 )
 
 // OutputMode represents an output mode, which determines how colors

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

@@ -7,7 +7,7 @@ package gocui
 import (
 	"strings"
 
-	"github.com/stefanhaller/tcell/v2"
+	"github.com/gdamore/tcell/v2"
 )
 
 // Key represents special keys or keys combinations.

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

@@ -5,8 +5,8 @@
 package gocui
 
 import (
+	"github.com/gdamore/tcell/v2"
 	"github.com/mattn/go-runewidth"
-	"github.com/stefanhaller/tcell/v2"
 )
 
 // We probably don't want this being a global variable for YOLO for now

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

@@ -13,9 +13,9 @@ import (
 	"unicode"
 	"unicode/utf8"
 
+	"github.com/gdamore/tcell/v2"
 	"github.com/go-errors/errors"
 	"github.com/mattn/go-runewidth"
-	"github.com/stefanhaller/tcell/v2"
 )
 
 // Constants for overlapping edges