Move to memcached:1.6, current supported version

Author: rfay

.github/workflows/tests.yml

@@ -61,7 +61,7 @@ jobs:
     - name: Download docker images
       run: | 
         mkdir junk && pushd junk && ddev config --auto && ddev debug download-images >/dev/null
-        docker pull memcached:1.5 >/dev/null
+        docker pull memcached:1.6 >/dev/null
     - name: tmate debugging session
       uses: mxschmitt/action-tmate@v3
       with:

README.md

@@ -11,7 +11,7 @@ This repository allows you to quickly install memcached into a [Ddev](https://dd
 
 ## Explanation
 
-This memcached recipe for [ddev](https://ddev.readthedocs.io) installs a [`.ddev/docker-compose.memcached.yaml`](docker-compose.memcached.yaml) using the memcached:1.5 docker image.
+This memcached recipe for [ddev](https://ddev.readthedocs.io) installs a [`.ddev/docker-compose.memcached.yaml`](docker-compose.memcached.yaml) using the `memcached` docker image.
 
 ## Interacting with Memcached
 

docker-compose.memcached.yaml

@@ -11,13 +11,9 @@
 version: '3.6'
 
 services:
-  # This is the service name used when running ddev commands accepting the
-  # --service flag.
   memcached:
-    # This is the name of the container. It is recommended to follow the same
-    # name convention used in the main docker-compose.yml file.
     container_name: ddev-${DDEV_SITENAME}-memcached
-    image: memcached:1.5
+    image: memcached:1.6
     networks: [default, ddev_default]
     restart: "no"
     # memcached is available at this port inside the container.