build(deps): bump github.com/spf13/viper from 1.16.0 to 1.18.1

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.16.0 to 1.18.1.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](spf13/viper@v1.16.0...v1.18.1)

---
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

@@ -16,24 +16,24 @@ require (
 	github.com/shurcooL/go v0.0.0-20200502201357-93f07166e636
 	github.com/sirupsen/logrus v1.9.3
 	github.com/spf13/cobra v1.8.0
-	github.com/spf13/viper v1.16.0
+	github.com/spf13/viper v1.18.1
 	github.com/stretchr/testify v1.8.4
 	github.com/theupdateframework/go-tuf v0.6.1
 	github.com/theupdateframework/notary v0.7.0
-	golang.org/x/exp v0.0.0-20221204150635-6dcec336b2bb
+	golang.org/x/exp v0.0.0-20230905200255-921286631fa9
 	golang.org/x/sys v0.15.0
-	google.golang.org/api v0.150.0
+	google.golang.org/api v0.153.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
 require (
-	cloud.google.com/go v0.110.8 // indirect
-	cloud.google.com/go/compute v1.23.1 // indirect
+	cloud.google.com/go v0.110.10 // indirect
+	cloud.google.com/go/compute v1.23.3 // indirect
 	cloud.google.com/go/compute/metadata v0.2.3 // indirect
-	cloud.google.com/go/iam v1.1.3 // indirect
+	cloud.google.com/go/iam v1.1.5 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.3 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/s2a-go v0.1.7 // indirect
@@ -46,28 +46,32 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/miekg/pkcs11 v1.0.3-0.20190429190417-a667d056470f // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
 	github.com/secure-systems-lab/go-securesystemslib v0.7.0 // indirect
-	github.com/spf13/afero v1.9.5 // indirect
-	github.com/spf13/cast v1.5.1 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/subosito/gotenv v1.4.2 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/thales-e-security/pool v0.0.2 // indirect
 	go.opencensus.io v0.24.0 // indirect
-	golang.org/x/crypto v0.14.0 // indirect
-	golang.org/x/net v0.17.0 // indirect
-	golang.org/x/oauth2 v0.13.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/crypto v0.16.0 // indirect
+	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/oauth2 v0.15.0 // indirect
 	golang.org/x/sync v0.5.0 // indirect
-	golang.org/x/text v0.13.0 // indirect
-	golang.org/x/time v0.3.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/time v0.5.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/genproto v0.0.0-20231016165738-49dd2c1f3d0b // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20231016165738-49dd2c1f3d0b // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20231030173426-d783a09b4405 // indirect
+	google.golang.org/genproto v0.0.0-20231106174013-bbf56f31fb17 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20231106174013-bbf56f31fb17 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20231120223509-83a465c0220f // indirect
 	google.golang.org/grpc v1.59.0 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect