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/gdamore/tcell/v2/event.go

@@ -1,53 +0,0 @@
-// Copyright 2015 The TCell Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use file except in compliance with the License.
-// You may obtain a copy of the license at
-//
-//    http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package tcell
-
-import (
-	"time"
-)
-
-// Event is a generic interface used for passing around Events.
-// Concrete types follow.
-type Event interface {
-	// When reports the time when the event was generated.
-	When() time.Time
-}
-
-// EventTime is a simple base event class, suitable for easy reuse.
-// It can be used to deliver actual timer events as well.
-type EventTime struct {
-	when time.Time
-}
-
-// When returns the time stamp when the event occurred.
-func (e *EventTime) When() time.Time {
-	return e.when
-}
-
-// SetEventTime sets the time of occurrence for the event.
-func (e *EventTime) SetEventTime(t time.Time) {
-	e.when = t
-}
-
-// SetEventNow sets the time of occurrence for the event to the current time.
-func (e *EventTime) SetEventNow() {
-	e.SetEventTime(time.Now())
-}
-
-// EventHandler is anything that handles events.  If the handler has
-// consumed the event, it should return true.  False otherwise.
-type EventHandler interface {
-	HandleEvent(Event) bool
-}