Bump github.com/spf13/afero from 1.3.3 to 1.3.4 (#21)

Bumps [github.com/spf13/afero](https://github.com/spf13/afero) from 1.3.3 to 1.3.4.
- [Release notes](https://github.com/spf13/afero/releases)
- [Commits](https://github.com/spf13/afero/compare/v1.3.3...v1.3.4)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

go.mod

@@ -13,10 +13,9 @@ require (
 	github.com/mmcdole/gofeed v1.0.0
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/nsf/termbox-go v0.0.0-20200204031403-4d2b513ad8be // indirect
-	github.com/spf13/afero v1.3.3
+	github.com/spf13/afero v1.3.4
 	github.com/stretchr/testify v1.6.1
 	golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e // indirect
-	golang.org/x/text v0.3.2 // indirect
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
 	gopkg.in/yaml.v2 v2.3.0
 )