[stable/drupal] Release 0.10.4 (#2658)

* drupal: update to `bitnami/drupal:8.4.2-r0`

* drupal: bump chart appVersion to `8.4.2`

* drupal: bump chart version to `0.10.4`

stable/drupal/Chart.yaml

@@ -1,6 +1,6 @@
 name: drupal
-version: 0.10.3
-appVersion: 8.4.1
+version: 0.10.4
+appVersion: 8.4.2
 description: One of the most versatile open source content management systems.
 keywords:
 - drupal

stable/drupal/values.yaml

@@ -1,7 +1,7 @@
 ## Bitnami Drupal image version
 ## ref: https://hub.docker.com/r/bitnami/drupal/tags/
 ##
-image: bitnami/drupal:8.4.1-r0
+image: bitnami/drupal:8.4.2-r0
 
 ## Optionally specify an array of imagePullSecrets.
 ## Secrets must be manually created in the namespace.