fix go.mod

go.mod

@@ -1,5 +1,7 @@
 module github.com/pfnet-research/git-ghost
 
+go 1.17
+
 require (
 	github.com/hashicorp/go-multierror v1.0.0
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
@@ -11,3 +13,10 @@ require (
 	golang.org/x/crypto v0.0.0-20190128193316-c7b33c32a30b // indirect
 	golang.org/x/sys v0.0.0-20190124100055-b90733256f2e // indirect
 )
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/hashicorp/errwrap v1.0.0 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+)