Go(deps): bump github.com/gorilla/mux from 1.7.3 to 1.8.1 (#38)

Bumps [github.com/gorilla/mux](https://github.com/gorilla/mux) from 1.7.3 to 1.8.1.
- [Release notes](https://github.com/gorilla/mux/releases)
- [Commits](gorilla/mux@v1.7.3...v1.8.1)

---
updated-dependencies:
- dependency-name: github.com/gorilla/mux
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/go-openapi/swag v0.19.5
 	github.com/go-openapi/validate v0.19.3
 	github.com/golang/protobuf v1.3.3
-	github.com/gorilla/mux v1.7.3
+	github.com/gorilla/mux v1.8.1
 	github.com/graymeta/stow v0.2.4
 	github.com/jpillora/overseer v0.0.0-20191216115108-e26c3c66567f
 	github.com/kelseyhightower/envconfig v1.4.0

go.sum

@@ -226,8 +226,8 @@ github.com/gophercloud/gophercloud v0.0.0-20190208042652-bc37892e1968/go.mod h1:
 github.com/gophercloud/utils v0.0.0-20190128072930-fbb6ab446f01/go.mod h1:wjDF8z83zTeg5eMLml5EBSlAhbF7G8DobyI1YsMuyzw=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
-github.com/gorilla/mux v1.7.3 h1:gnP5JzjVOuiZD07fKKToCAOjS0yOpj/qPETTXCCS6hw=
-github.com/gorilla/mux v1.7.3/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
+github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
+github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/graymeta/stow v0.2.4 h1:qDGstknYXqcnmBQ5TRJtxD9Qv1MuRbYRhLoSMeUDs7U=
 github.com/graymeta/stow v0.2.4/go.mod h1:+0vRL9oMECKjPMP7OeVWl8EIqRCpFwDlth3mrAeV2Kw=