[stable/kong] update deps: psql and cassandra (#17873)

Signed-off-by: Harry Bagdi <harrybagdi@gmail.com>

stable/kong/Chart.yaml

@@ -12,5 +12,5 @@ maintainers:
 name: kong
 sources:
 - https://github.com/Kong/kong
-version: 0.20.0
+version: 0.21.0
 appVersion: 1.3

stable/kong/ci/cassandra.yaml

@@ -3,5 +3,5 @@ env:
 
 cassandra:
   enabled: true
-postgres:
+postgresql:
   enabled: false

stable/kong/requirements.lock

@@ -1,9 +1,9 @@
 dependencies:
 - name: postgresql
   repository: https://kubernetes-charts.storage.googleapis.com/
-  version: 3.9.5
+  version: 6.3.12
 - name: cassandra
   repository: https://kubernetes-charts-incubator.storage.googleapis.com/
-  version: 0.10.5
-digest: sha256:797c1cf8eb6504c93015f1b8f16b263dd94dca9a73cb647bdf3c0af153fba62c
-generated: 2019-05-09T13:44:59.216637988-07:00
+  version: 0.13.3
+digest: sha256:6c1d6473c869ee26836bec19f3638ae148d11398a4f16dce25f62beeaf67fb67
+generated: "2019-10-10T11:19:21.654989947-07:00"

stable/kong/requirements.yaml

@@ -1,9 +1,9 @@
 dependencies:
 - name: postgresql
-  version: ~3.9.1
+  version: ~6.3.0
   repository: https://kubernetes-charts.storage.googleapis.com/
   condition: postgresql.enabled
 - name: cassandra
-  version: ~0.10.5
+  version: ~0.13.0
   repository: https://kubernetes-charts-incubator.storage.googleapis.com/
   condition: cassandra.enabled