use grpc.NewClient after grpc.Dial deprecation (#199)

README.md

@@ -64,7 +64,7 @@ distribution of workload.
 The following code snippet shows just one connection.
 
 ```go
-conn, err := grpc.Dial("localhost:9080", grpc.WithTransportCredentials(insecure.NewCredentials()))
+conn, err := grpc.NewClient("localhost:9080", grpc.WithTransportCredentials(insecure.NewCredentials()))
 // Check error
 defer conn.Close()
 dgraphClient := dgo.NewDgraphClient(api.NewDgraphClient(conn))
@@ -76,7 +76,7 @@ The client can be configured to use gRPC compression:
 dialOpts := append([]grpc.DialOption{},
 	grpc.WithTransportCredentials(insecure.NewCredentials()),
 	grpc.WithDefaultCallOptions(grpc.UseCompressor(gzip.Name)))
-d, err := grpc.Dial("localhost:9080", dialOpts...)
+d, err := grpc.NewClient("localhost:9080", dialOpts...)
 ```
 
 ### Login into a namespace

client.go

@@ -112,7 +112,7 @@ func DialCloud(endpoint, key string) (*grpc.ClientConn, error) {
 		return nil, err
 	}
 	creds := credentials.NewClientTLSFromCert(pool, "")
-	return grpc.Dial(
+	return grpc.NewClient(
 		grpcHost,
 		grpc.WithTransportCredentials(creds),
 		grpc.WithPerRPCCredentials(&authCreds{key}),

examples_test.go

@@ -38,7 +38,7 @@ const (
 type CancelFunc func()
 
 func getDgraphClient() (*dgo.Dgraph, CancelFunc) {
-	conn, err := grpc.Dial(dgraphAddress, grpc.WithTransportCredentials(insecure.NewCredentials()))
+	conn, err := grpc.NewClient(dgraphAddress, grpc.WithTransportCredentials(insecure.NewCredentials()))
 	if err != nil {
 		log.Fatal("While trying to dial gRPC")
 	}