feat: go mod init; go mod tidy

go.mod

@@ -0,0 +1,28 @@
+module github.com/tjhop/clip
+
+go 1.17
+
+require (
+	github.com/atotto/clipboard v0.1.4
+	github.com/mitchellh/go-homedir v1.1.0
+	github.com/spf13/cobra v1.2.1
+	github.com/spf13/viper v1.9.0
+	gopkg.in/yaml.v2 v2.4.0
+)
+
+require (
+	github.com/fsnotify/fsnotify v1.5.1 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/magiconair/properties v1.8.5 // indirect
+	github.com/mitchellh/mapstructure v1.4.2 // indirect
+	github.com/pelletier/go-toml v1.9.4 // indirect
+	github.com/spf13/afero v1.6.0 // indirect
+	github.com/spf13/cast v1.4.1 // indirect
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/subosito/gotenv v1.2.0 // indirect
+	golang.org/x/sys v0.0.0-20210823070655-63515b42dcdf // indirect
+	golang.org/x/text v0.3.6 // indirect
+	gopkg.in/ini.v1 v1.63.2 // indirect
+)