Bump github.com/spf13/viper from 1.7.0 to 1.8.1

go.mod

@@ -12,21 +12,16 @@ require (
 	github.com/go-sql-driver/mysql v1.5.0
 	github.com/iancoleman/strcase v0.0.0-20191112232945-16388991a334
 	github.com/magefile/mage v1.10.0
-	github.com/mitchellh/mapstructure v1.2.2 // indirect
 	github.com/onsi/ginkgo v1.14.0
 	github.com/onsi/gomega v1.10.1
 	github.com/opencontainers/go-digest v1.0.0 // indirect
-	github.com/pelletier/go-toml v1.7.0 // indirect
 	github.com/petergtz/pegomock v2.8.0+incompatible
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/spf13/afero v1.2.2 // indirect
 	github.com/spf13/cast v1.3.1 // indirect
 	github.com/spf13/cobra v1.0.0
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.7.0
+	github.com/spf13/viper v1.8.1
 	go.opentelemetry.io/otel v0.8.0
-	golang.org/x/tools v0.0.0-20200225230052-807dcd883420 // indirect
-	google.golang.org/grpc v1.30.0
-	gopkg.in/ini.v1 v1.55.0 // indirect
+	google.golang.org/grpc v1.38.0
 )