Bump github.com/stretchr/testify from 1.5.1 to 1.6.0

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.5.1 to 1.6.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.5.1...v1.6.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

go.mod

@@ -12,7 +12,6 @@ require (
 	github.com/hashicorp/go-syslog v1.0.0
 	github.com/imdario/mergo v0.3.8 // indirect
 	github.com/kavu/go_reuseport v1.4.1-0.20181221084137-1f6171f327ed
-	github.com/kr/pretty v0.1.0 // indirect
 	github.com/letsencrypt/pkcs11key/v4 v4.0.0
 	github.com/mastahyeti/certstore v0.0.5
 	github.com/mattn/go-colorable v0.1.4 // indirect
@@ -26,14 +25,13 @@ require (
 	github.com/spiffe/go-spiffe v0.0.0-20190922191205-018e7197ed1c
 	github.com/square/certigo v1.11.0
 	github.com/square/go-sq-metrics v0.0.0-20170531223841-ae72f332d0d9
-	github.com/stretchr/testify v1.5.1
+	github.com/stretchr/testify v1.6.0
 	golang.org/x/crypto v0.0.0-20191002192127-34f69633bfdc // indirect
 	golang.org/x/net v0.0.0-20191003171128-d98b1b443823 // indirect
 	golang.org/x/text v0.3.2 // indirect
 	google.golang.org/genproto v0.0.0-20191002211648-c459b9ce5143 // indirect
 	google.golang.org/grpc v1.24.0 // indirect
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 )
 
 go 1.13

go.sum

@@ -198,6 +198,8 @@ github.com/stretchr/testify v1.5.0 h1:DMOzIV76tmoDNE9pX6RSN0aDtCYeCg5VueieJaAo1u
 github.com/stretchr/testify v1.5.0/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+github.com/stretchr/testify v1.6.0 h1:jlIyCplCJFULU/01vCkhKuTyc3OorI3bJFuw6obfgho=
+github.com/stretchr/testify v1.6.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20181015023909-0c41d7ab0a0e h1:IzypfodbhbnViNUO/MEh0FzCUooG97cIGfdggUrUSyU=
 golang.org/x/crypto v0.0.0-20181015023909-0c41d7ab0a0e/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -285,5 +287,7 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5 h1:ymVxjfMaHvXD8RqPRmzHHsB3VvucivSkIAvJFDI5O3c=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=