build: update go modules

go.mod

@@ -1,21 +1,15 @@
 module github.com/suzuki-shunsuke/go-graylog/v11
 
-go 1.13
+go 1.14
 
 require (
 	github.com/AlecAivazis/survey/v2 v2.0.7
-	github.com/go-playground/universal-translator v0.17.0 // indirect
 	github.com/hashicorp/terraform v0.12.24
-	github.com/leodido/go-urn v1.2.0 // indirect
 	github.com/mitchellh/mapstructure v1.3.0
 	github.com/sanity-io/litter v1.2.0
-	github.com/sirupsen/logrus v1.6.0
-	github.com/stretchr/testify v1.4.0
+	github.com/stretchr/testify v1.5.1
 	github.com/suzuki-shunsuke/flute v0.7.0
 	github.com/suzuki-shunsuke/go-jsoneq v0.1.2
 	github.com/suzuki-shunsuke/go-ptr v1.0.0
 	github.com/suzuki-shunsuke/go-set/v6 v6.0.1
-	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
-	gopkg.in/go-playground/validator.v9 v9.31.0
-	gopkg.in/mgo.v2 v2.0.0-20190816093944-a6b53ec6cb22
 )