[stable/opencart] Update dependencies for opencart (#15880)

Signed-off-by: tompizmor <tompizmor@gmail.com>

stable/opencart/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: opencart
-version: 5.1.1
+version: 6.0.0
 appVersion: 3.0.3-2
 description: A free and open source e-commerce platform for online merchants. It provides a professional and reliable foundation for a successful online store.
 keywords:

stable/opencart/requirements.lock

@@ -1,6 +1,6 @@
 dependencies:
 - name: mariadb
   repository: https://kubernetes-charts.storage.googleapis.com/
-  version: 5.11.3
-digest: sha256:0593b73b2163fbbbae061de1aa2b8280d43f8a423a91e1c7375c0b6c86784b1c
-generated: 2019-06-10T02:49:21.330564892Z
+  version: 6.7.2
+digest: sha256:a363428d6463718a9523a88c70e485218373e315f2979cb1bb17b034ec2be96a
+generated: "2019-07-25T09:26:18.630878+02:00"

stable/opencart/requirements.yaml

@@ -1,5 +1,5 @@
 dependencies:
 - name: mariadb
-  version: 5.x.x
+  version: 6.x.x
   repository: https://kubernetes-charts.storage.googleapis.com/
   condition: mariadb.enabled