Bump compose config version

Author: NoelDeMartin

base.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     image: "moodlehq/moodle-php-apache:${MOODLE_DOCKER_PHP_VERSION}"

db.mariadb.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     environment:

db.mssql.5.6.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     environment:

db.mssql.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     environment:

db.mysql.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     environment:

db.oracle.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     environment:

moodle-app-dev.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     environment:

moodle-app.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     environment:

phpunit-external-services.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
       environment:

selenium.chrome.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     environment:

selenium.debug.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   selenium:
     ports:

service.mail.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     volumes:

volumes-cached.yml

@@ -1,6 +1,6 @@
 # Here we support https://docs.docker.com/docker-for-mac/osxfs-caching/
 # for improved performance on mac
-version: "2"
+version: "2.3"
 services:
   webserver:
     volumes:

webserver.port.yml

@@ -1,4 +1,4 @@
-version: "2"
+version: "2.3"
 services:
   webserver:
     environment: