[update] library update.

go.mod

@@ -5,16 +5,16 @@ go 1.13
 require (
 	github.com/ashwanthkumar/slack-go-webhook v0.0.0-20200209025033-430dd4e66960
 	github.com/elazarl/goproxy v0.0.0-20210110162100-a92cc753f88e // indirect
-	github.com/gin-gonic/gin v1.6.3
+	github.com/gin-gonic/gin v1.7.2
 	github.com/google/uuid v1.2.0
 	github.com/gorilla/websocket v1.4.2
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/parnurzeal/gorequest v0.2.16 // indirect
-	github.com/spf13/cobra v1.1.3
-	github.com/spf13/viper v1.7.1
+	github.com/spf13/cobra v1.2.1
+	github.com/spf13/viper v1.8.1
 	github.com/stripe/stripe-go/v72 v72.50.0
 	golang.org/x/crypto v0.0.0-20210314154223-e6e6c4f2bb5b
 	gorm.io/driver/mysql v1.1.1
-	gorm.io/gorm v1.21.11
+	gorm.io/gorm v1.21.12
 	moul.io/http2curl v1.0.0 // indirect
 )