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>

Author: dependabot-preview[bot]

go.mod

@@ -3,32 +3,26 @@ module github.com/awslabs/aws-lambda-container-image-converter
 go 1.13
 
 require (
-	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 // indirect
+	github.com/DataDog/zstd v1.4.0 // indirect
 	github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 // indirect
 	github.com/aws/aws-sdk-go v1.30.18
 	github.com/containers/image/v5 v5.4.3
-	github.com/containers/storage v1.15.5 // indirect
-	github.com/docker/distribution v2.7.1+incompatible // indirect
-	github.com/docker/docker v1.4.2-0.20181210162850-6e3113f700de // indirect
-	github.com/docker/go-connections v0.4.0 // indirect
-	github.com/docker/go-metrics v0.0.1 // indirect
 	github.com/dsnet/compress v0.0.1 // indirect
 	github.com/frankban/quicktest v1.7.2 // indirect
-	github.com/ghodss/yaml v1.0.0 // indirect
 	github.com/golang/mock v1.4.3
 	github.com/golang/snappy v0.0.1 // indirect
-	github.com/gorilla/mux v1.7.3 // indirect
+	github.com/klauspost/cpuid v1.2.1 // indirect
 	github.com/mattn/go-zglob v0.0.1
 	github.com/mholt/archiver v3.1.1+incompatible
 	github.com/nwaples/rardecode v1.0.0 // indirect
 	github.com/opencontainers/go-digest v1.0.0-rc1
 	github.com/opencontainers/image-spec v1.0.2-0.20190823105129-775207bd45b6
 	github.com/pierrec/lz4 v2.4.0+incompatible // indirect
 	github.com/pkg/errors v0.9.1
-	github.com/stretchr/testify v1.5.1
+	github.com/spf13/pflag v1.0.3 // indirect
+	github.com/stretchr/testify v1.6.0
 	github.com/urfave/cli v1.22.4
 	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect
-	golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
 	gopkg.in/yaml.v2 v2.2.8
 	k8s.io/client-go v11.0.0+incompatible // indirect
 )

go.sum

@@ -323,6 +323,8 @@ github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJy
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 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=
 github.com/syndtr/gocapability v0.0.0-20170704070218-db04d3cc01c8/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2 h1:b6uOv7YOFK0TYG7HtkIgExQo+2RdLuwRft63jn2HWj8=
 github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
@@ -473,6 +475,8 @@ gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
 gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/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=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=