Update module github.com/stretchr/testify to v1.8.1

go.mod

@@ -10,6 +10,36 @@ require (
 	github.com/cresta/zapctx v0.0.1
 	github.com/gorilla/mux v1.8.0
 	github.com/signalfx/golib/v3 v3.3.19
-	github.com/stretchr/testify v1.7.0
+	github.com/stretchr/testify v1.8.1
 	go.uber.org/zap v1.16.0
 )
+
+require (
+	github.com/DataDog/datadog-go v4.4.0+incompatible // indirect
+	github.com/Microsoft/go-winio v0.5.0 // indirect
+	github.com/cresta/magehelper v0.0.56 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-logfmt/logfmt v0.4.0 // indirect
+	github.com/go-stack/stack v1.8.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
+	github.com/google/uuid v1.2.0 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515 // indirect
+	github.com/magefile/mage v1.11.0 // indirect
+	github.com/philhofer/fwd v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/tinylib/msgp v1.1.5 // indirect
+	go.uber.org/atomic v1.7.0 // indirect
+	go.uber.org/multierr v1.6.0 // indirect
+	golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d // indirect
+	golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069 // indirect
+	golang.org/x/text v0.3.6 // indirect
+	golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 // indirect
+	google.golang.org/grpc v1.41.0 // indirect
+	google.golang.org/protobuf v1.26.0 // indirect
+	gopkg.in/DataDog/dd-trace-go.v1 v1.29.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)