update to github.com/golangci/golangci-lint v1.21.0

go.mod

@@ -3,11 +3,9 @@ module github.com/filecoin-project/go-sectorbuilder
 go 1.12
 
 require (
-	github.com/golangci/golangci-lint v1.17.1 // indirect
+	github.com/golangci/golangci-lint v1.21.0 // indirect
 	github.com/hashicorp/golang-lru v0.5.3 // indirect
 	github.com/ipfs/go-log v0.0.1
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.1 // indirect
 	github.com/neelance/parallel v0.0.0-20160708114440-4de9ce63d14c // indirect
 	github.com/opentracing/basictracer-go v1.0.0 // indirect
 	github.com/pkg/errors v0.8.1
@@ -16,10 +14,5 @@ require (
 	github.com/sourcegraph/ctxvfs v0.0.0-20180418081416-2b65f1b1ea81 // indirect
 	github.com/sourcegraph/go-langserver v2.0.0+incompatible // indirect
 	github.com/sourcegraph/jsonrpc2 v0.0.0-20190106185902-35a74f039c6a // indirect
-	github.com/stretchr/testify v1.3.0
-	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 // indirect
-	golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7 // indirect
-	golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a // indirect
-	golang.org/x/text v0.3.2 // indirect
-	golang.org/x/tools v0.0.0-20190813142322-97f12d73768f // indirect
+	github.com/stretchr/testify v1.4.0
 )