Bump google.golang.org/grpc from 1.29.1 to 1.56.3

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.29.1 to 1.56.3.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.29.1...v1.56.3)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-version: 1.56.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

go.mod

@@ -4,7 +4,7 @@ go 1.14
 
 require (
 	github.com/logrusorgru/aurora v0.0.0-20200102142835-e9ef32dff381
-	github.com/stretchr/testify v1.5.1
+	github.com/stretchr/testify v1.8.3
 	go.uber.org/zap v1.15.0
-	google.golang.org/grpc v1.29.1
+	google.golang.org/grpc v1.56.3
 )