fix: use dyff to check that yaml files are equal

Signed-off-by: AhmedGrati <ahmedgrati1999@gmail.com>

script/test/fixtures/compose-env-interpolation/docker-compose.yaml

@@ -5,3 +5,5 @@ services:
     labels:
       kompose.image-pull-policy: "${IMAGE_PULL_POLICY:-IfNotPresent}"
     build: .
+    ports:
+      - 80:80

script/test/fixtures/compose-env-interpolation/output-k8s.yaml

@@ -1,3 +1,23 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    kompose.image-pull-policy: IfNotPresent
+  creationTimestamp: null
+  labels:
+    io.kompose.service: foo
+  name: foo
+spec:
+  ports:
+    - name: "80"
+      port: 80
+      targetPort: 80
+  selector:
+    io.kompose.service: foo
+status:
+  loadBalancer: {}
+
 ---
 apiVersion: apps/v1
 kind: Deployment
@@ -27,6 +47,11 @@ spec:
         - image: foo
           imagePullPolicy: IfNotPresent
           name: foo
+          ports:
+            - containerPort: 80
+              hostPort: 80
+              protocol: TCP
           resources: {}
       restartPolicy: Always
 status: {}
+