format code with gofumpt

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/stack/swarm/deploy_composefile_test.go

@@ -19,7 +19,7 @@ func (n notFound) NotFound() bool {
 }
 
 func TestValidateExternalNetworks(t *testing.T) {
-	var testcases = []struct {
+	testcases := []struct {
 		inspectResponse types.NetworkResource
 		inspectError    error
 		expectedMsg     string

cli/command/stack/swarm/deploy_test.go

@@ -63,7 +63,7 @@ func TestServiceUpdateResolveImageChanged(t *testing.T) {
 		},
 	})
 
-	var testcases = []struct {
+	testcases := []struct {
 		image                 string
 		expectedQueryRegistry bool
 		expectedImage         string