Bump github.com/spf13/viper from 1.12.0 to 1.17.0

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.12.0 to 1.17.0.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](spf13/viper@v1.12.0...v1.17.0)

---
updated-dependencies:
- dependency-name: github.com/spf13/viper
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -4,5 +4,5 @@ go 1.15
 
 require (
 	github.com/spf13/cobra v1.6.1
-	github.com/spf13/viper v1.12.0
+	github.com/spf13/viper v1.17.0
 )