fix(deps): update module github.com/spf13/viper to v1.21.0

Author: renovate[bot]

go.mod

@@ -1,8 +1,48 @@
 module github.com/Whirlsplash/munch
 
-go 1.16
+go 1.23.0
 
 require (
 	github.com/bwmarrin/discordgo v0.23.3-0.20210627161652-421e14965030
-	github.com/spf13/viper v1.8.1
+	github.com/spf13/viper v1.21.0
+)
+
+require (
+	github.com/creack/pty v1.1.9 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/frankban/quicktest v1.14.6 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/gorilla/websocket v1.4.2 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/kr/pty v1.1.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rogpeppe/go-internal v1.9.0 // indirect
+	github.com/sagikazarmark/locafero v0.11.0 // indirect
+	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
+	github.com/spf13/afero v1.15.0 // indirect
+	github.com/spf13/cast v1.10.0 // indirect
+	github.com/spf13/pflag v1.0.10 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
+	github.com/stretchr/testify v1.11.1 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	github.com/yuin/goldmark v1.4.13 // indirect
+	go.yaml.in/yaml/v3 v3.0.4 // indirect
+	golang.org/x/crypto v0.40.0 // indirect
+	golang.org/x/mod v0.26.0 // indirect
+	golang.org/x/net v0.42.0 // indirect
+	golang.org/x/sync v0.16.0 // indirect
+	golang.org/x/sys v0.34.0 // indirect
+	golang.org/x/telemetry v0.0.0-20250710130107-8d8967aff50b // indirect
+	golang.org/x/term v0.33.0 // indirect
+	golang.org/x/text v0.28.0 // indirect
+	golang.org/x/tools v0.35.0 // indirect
+	golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7 // indirect
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
+	gopkg.in/errgo.v2 v2.1.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )