更新依赖安装逻辑

backend/vendor/github.com/ugorji/go/codec/codecgen.go

@@ -1,13 +0,0 @@
-// +build codecgen generated
-
-package codec
-
-// this file is here, to set the codecgen variable to true
-// when the build tag codecgen is set.
-//
-// this allows us do specific things e.g. skip missing fields tests,
-// when running in codecgen mode.
-
-func init() {
-	codecgen = true
-}