See how Boundary would look with gofumpt applied (#853)

* See how Boundary would look with https://github.com/mvdan/gofumpt applied

Results of running `gofumpt -w -s .`

* Update tools file and Makefile for gofumpt

Co-authored-by: Jeff Mitchell <jeffrey.mitchell@gmail.com>

internal/cmd/commands/authmethods/authmethod.go

@@ -14,8 +14,10 @@ import (
 	"github.com/posener/complete"
 )
 
-var _ cli.Command = (*Command)(nil)
-var _ cli.CommandAutocomplete = (*Command)(nil)
+var (
+	_ cli.Command             = (*Command)(nil)
+	_ cli.CommandAutocomplete = (*Command)(nil)
+)
 
 type Command struct {
 	*base.Command