update go mod and sum

Author: lunny

go.mod

@@ -80,7 +80,6 @@ require (
 	github.com/prometheus/client_golang v1.1.0
 	github.com/prometheus/procfs v0.0.4 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20190321074620-2f0d2b0e0001 // indirect
-	github.com/russross/blackfriday v2.0.0+incompatible // indirect
 	github.com/russross/blackfriday/v2 v2.0.1
 	github.com/saintfish/chardet v0.0.0-20120816061221-3af4cd4741ca // indirect
 	github.com/satori/go.uuid v1.2.0