Bump gocui

... and import stefanhaller's tcell fork for real rather than just replacing it

This solves the problem that people trying to
"go install github.com/jesseduffield/lazygit@latest" would get the error

go: github.com/jesseduffield/lazygit@latest (in github.com/jesseduffield/lazygit@v0.40.0):
  The go.mod file for the module providing named packages contains one or
  more replace directives. It must not contain directives that would cause
  it to be interpreted differently than if it were the main module.

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

@@ -4,7 +4,7 @@
 
 package gocui
 
-import "github.com/gdamore/tcell/v2"
+import "github.com/stefanhaller/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/gdamore/tcell/v2"
+	"github.com/stefanhaller/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