Fix lint

pkg/migration/20201218152741.go

@@ -17,10 +17,11 @@
 package migration
 
 import (
+	"strings"
+
 	"code.vikunja.io/api/pkg/config"
 	"code.vikunja.io/api/pkg/log"
 	"src.techknowlogick.com/xormigrate"
-	"strings"
 	"xorm.io/xorm"
 )
 
@@ -59,8 +60,8 @@ func init() {
 		ID:          "20201218152741",
 		Description: "Make sure all int64 fields are bigint in the db",
 		Migrate: func(tx *xorm.Engine) error {
-			columns := make(map[string][]string) // table is the key, columns are the contents
-			columns = map[string][]string{
+			// table is the key, columns are the contents
+			columns := map[string][]string{
 				"totp": {
 					"id",
 					"user_id",