Resolve "Improve security by enabling and enforcing more linting rules"

Description

See #242 (closed)

cli/cmd/deviceSubscribe.go

@@ -32,6 +32,7 @@ POSSIBILITY OF SUCH DAMAGE.
 package cmd
 
 import (
+	"errors"
 	"io"
 
 	"code.fbi.h-da.de/danet/gosdn/api/go/gosdn/pnd"
@@ -79,7 +80,8 @@ The device UUID and requested paths must be specified as a positional arguments.
 			subscribeResponse, err := subClient.Recv()
 			if err != nil {
 				if err != nil {
-					if err == io.EOF {
+
+					if errors.Is(err, io.EOF) {
 						break
 					}
 					log.Error(err)