Bump fyne.io/fyne from 1.2.3 to 1.4.3

Bumps [fyne.io/fyne](https://github.com/fyne-io/fyne) from 1.2.3 to 1.4.3.
- [Release notes](https://github.com/fyne-io/fyne/releases)
- [Changelog](https://github.com/fyne-io/fyne/blob/master/CHANGELOG.md)
- [Commits](https://github.com/fyne-io/fyne/compare/v1.2.3...v1.4.3)

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -3,11 +3,7 @@ module github.com/taiidani/hwrc-proton-launcher
 go 1.13
 
 require (
-	fyne.io/fyne v1.2.3
-	github.com/kr/pretty v0.1.0 // indirect
+	fyne.io/fyne v1.4.3
 	github.com/mitchellh/go-ps v1.0.0
 	github.com/sirupsen/logrus v1.7.0
-	github.com/stretchr/testify v1.4.0 // indirect
-	golang.org/x/net v0.0.0-20190620200207-3b0461eec859 // indirect
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 )