Update module github.com/sirupsen/logrus to v1.8.1

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/magiconair/properties v1.8.0
 	github.com/pkg/errors v0.8.1
-	github.com/sirupsen/logrus v1.4.1
+	github.com/sirupsen/logrus v1.8.1
 	github.com/stretchr/objx v0.2.0 // indirect
 	github.com/stretchr/testify v1.3.0
 	golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480 // indirect