Bump github.com/gorilla/mux from 1.7.0 to 1.8.0

Bumps [github.com/gorilla/mux](https://github.com/gorilla/mux) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/gorilla/mux/releases)
- [Commits](gorilla/mux@v1.7.0...v1.8.0)

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

go.mod

@@ -20,7 +20,7 @@ require (
 	github.com/gogo/protobuf v1.2.1 // indirect
 	github.com/golang/mock v1.2.0
 	github.com/google/go-cmp v0.2.0 // indirect
-	github.com/gorilla/mux v1.7.0
+	github.com/gorilla/mux v1.8.0
 	github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c // indirect
 	github.com/onsi/ginkgo v1.8.0 // indirect
 	github.com/onsi/gomega v1.5.0 // indirect

go.sum

@@ -48,8 +48,8 @@ github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/uuid v1.0.0 h1:b4Gk+7WdP/d3HZH8EJsZpvV7EtDOgaZLtnaNGIu1adA=
 github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/gorilla/mux v1.7.0 h1:tOSd0UKHQd6urX6ApfOn4XdBMY6Sh1MfxV3kmaazO+U=
-github.com/gorilla/mux v1.7.0/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
+github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
+github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
 github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=