Update module github.com/spf13/viper to v1.8.0 (#3058)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

go.mod

@@ -35,7 +35,6 @@ require (
 	github.com/onsi/ginkgo v1.15.0 // indirect
 	github.com/onsi/gomega v1.10.5 // indirect
 	github.com/oschwald/maxminddb-golang v1.8.0
-	github.com/pelletier/go-toml v1.5.0 // indirect
 	github.com/pquerna/otp v1.3.0
 	github.com/prometheus/client_golang v1.11.0
 	github.com/robfig/cron/v3 v3.0.1
@@ -43,8 +42,7 @@ require (
 	github.com/sirupsen/logrus v1.8.1
 	github.com/spf13/afero v1.6.0
 	github.com/spf13/cobra v1.1.3
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/viper v1.7.1
+	github.com/spf13/viper v1.8.0
 	github.com/stretchr/testify v1.7.0
 	github.com/ugorji/go/codec v1.2.6
 	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a