build(deps): bump github.com/Azure/go-autorest/autorest (#3112)

Bumps [github.com/Azure/go-autorest/autorest](https://github.com/Azure/go-autorest) from 0.5.0 to 0.8.0.
- [Release notes](https://github.com/Azure/go-autorest/releases)
- [Changelog](https://github.com/Azure/go-autorest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Azure/go-autorest/compare/autorest/v0.5.0...autorest/v0.8.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

go.mod

@@ -5,7 +5,7 @@ go 1.12
 require (
 	cloud.google.com/go v0.41.0 // indirect
 	github.com/Azure/azure-sdk-for-go v31.1.0+incompatible
-	github.com/Azure/go-autorest/autorest v0.5.0
+	github.com/Azure/go-autorest/autorest v0.8.0
 	github.com/Azure/go-autorest/autorest/azure/auth v0.1.0
 	github.com/Azure/go-autorest/autorest/to v0.2.0 // indirect
 	github.com/Shopify/sarama v1.21.0 // indirect