Bump github.com/gin-gonic/gin from 1.4.0 to 1.7.0 (#128)

Bumps [github.com/gin-gonic/gin](https://github.com/gin-gonic/gin) from 1.4.0 to 1.7.0.
- [Release notes](https://github.com/gin-gonic/gin/releases)
- [Changelog](https://github.com/gin-gonic/gin/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gin-gonic/gin/compare/v1.4.0...v1.7.0)

---
updated-dependencies:
- dependency-name: github.com/gin-gonic/gin
  dependency-type: direct:production
...

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

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

go.mod

@@ -8,21 +8,20 @@ require (
 	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
 	github.com/eapache/queue v1.1.0
 	github.com/eclipse/paho.mqtt.golang v1.2.0
-	github.com/gin-gonic/gin v1.4.0
-	github.com/golang/protobuf v1.3.2 // indirect
+	github.com/gin-gonic/gin v1.7.0
 	github.com/google/uuid v1.1.1
 	github.com/kr/pretty v0.1.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.1 // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pkg/errors v0.8.1 // indirect
 	github.com/segmentio/fasthash v0.0.0-20180216231524-a72b379d632e
-	github.com/stretchr/testify v1.3.0
+	github.com/stretchr/testify v1.4.0
 	github.com/tidwall/gjson v1.6.8
 	go.uber.org/atomic v1.4.0 // indirect
 	go.uber.org/multierr v1.1.0 // indirect
 	go.uber.org/zap v1.10.0
-	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 // indirect
 	golang.org/x/net v0.0.0-20190724013045-ca1201d0de80
-	golang.org/x/sys v0.0.0-20190730183949-1393eb018365 // indirect
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 	gopkg.in/jcmturner/goidentity.v3 v3.0.0 // indirect
 )