feat(argo-rollouts): Default to keeping CRD's on helm uninstall (#922)

Signed-off-by: Artem <code@temik.me>

charts/argo-rollouts/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: "v1.0.2"
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 2.0.2
+version: 2.1.0
 icon: https://argoproj.github.io/argo-rollouts/assets/logo.png
 home: https://github.com/argoproj/argo-helm
 maintainers:
@@ -11,4 +11,4 @@ maintainers:
   - name: jessesuen
 annotations:
   artifacthub.io/changes: |
-    - "[Fixed]: use image.tag in app labels if provided"
+    - "[Added]: Keep CRDs on Helm uninstall by default, add corresponding option"