chore(deps): bump github.com/spf13/pflag from 1.0.3 to 1.0.5 (#863)

Bumps [github.com/spf13/pflag](https://github.com/spf13/pflag) from 1.0.3 to 1.0.5.
- [Release notes](https://github.com/spf13/pflag/releases)
- [Commits](https://github.com/spf13/pflag/compare/v1.0.3...v1.0.5)

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

go.mod

@@ -23,7 +23,7 @@ require (
 	github.com/spf13/afero v1.2.2
 	github.com/spf13/cobra v0.0.5
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/pflag v1.0.3
+	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.4.0
 	github.com/vmihailenco/msgpack v4.0.4+incompatible // indirect
 	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect