update go-sectorbuilder and golangci-lint

go.mod

@@ -20,10 +20,9 @@ require (
 	github.com/filecoin-project/go-leb128 v0.0.0-20190212224330-8d79a5489543
 	github.com/filecoin-project/go-sectorbuilder v0.0.0-20190801004428-e75bc9b0aaea
 	github.com/go-check/check v0.0.0-20190902080502-41f04d3bba15 // indirect
-	github.com/go-critic/go-critic v0.0.0-20181204210945-ee9bf5809ead // indirect
 	github.com/golang/groupcache v0.0.0-20191027212112-611e8accdfc9 // indirect
 	github.com/golang/mock v1.3.1 // indirect
-	github.com/golangci/golangci-lint v1.17.1
+	github.com/golangci/golangci-lint v1.21.0
 	github.com/google/go-cmp v0.3.1 // indirect
 	github.com/google/go-github v17.0.0+incompatible
 	github.com/google/go-querystring v1.0.0 // indirect
@@ -73,7 +72,6 @@ require (
 	github.com/libp2p/go-stream-muxer v0.0.1
 	github.com/libp2p/go-yamux v1.2.4 // indirect
 	github.com/magiconair/properties v1.8.1
-	github.com/mattn/go-colorable v0.1.4 // indirect
 	github.com/mattn/go-isatty v0.0.10 // indirect
 	github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1
 	github.com/mitchellh/go-homedir v1.1.0
@@ -98,9 +96,7 @@ require (
 	github.com/smartystreets/assertions v1.0.1 // indirect
 	github.com/spf13/afero v1.2.2 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/spf13/viper v1.5.0 // indirect
-	github.com/stretchr/objx v0.2.0 // indirect
 	github.com/stretchr/testify v1.4.0
 	github.com/whyrusleeping/cbor-gen v0.0.0-20191001154818-b4b5288fcb86
 	github.com/whyrusleeping/go-logging v0.0.1
@@ -120,7 +116,6 @@ require (
 	google.golang.org/appengine v1.6.5 // indirect
 	google.golang.org/genproto v0.0.0-20191028173616-919d9bdd9fe6 // indirect
 	google.golang.org/grpc v1.24.0 // indirect
-	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/yaml.v2 v2.2.5 // indirect
 	gotest.tools v2.2.0+incompatible
 )