Update to support SF 6.4 & ^7.0, remove older versions

.github/workflows/test.yml

@@ -11,13 +11,10 @@ jobs:
     strategy:
       matrix:
         php:
-          - '7.2'
-          - '7.3'
-          - '7.4'
+          - '8.1'
         symfony-version:
-          - '~3.4'
-          - "~4.4"
-          - "~5.4"
+          - "~6.4"
+          - "~7.1"
 
     steps:
       - uses: actions/checkout@v2

.travis.yml

@@ -1,13 +1,10 @@
 language: php
 php:
-    - 7.4
-    - 7.3
-    - 7.2
+    - 8.1
 
 env:
-  - SYMFONY_VERSION="~3.4"
-  - SYMFONY_VERSION="~4.4"
-  - SYMFONY_VERSION="~5.4"
+  - SYMFONY_VERSION="~6.4"
+  - SYMFONY_VERSION="~7.1"
 
 before_script:
   - composer selfupdate

Command/BaseMaintenanceCommand.php

@@ -34,7 +34,7 @@ protected function configure()
         );
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $status = $input->getArgument("status");
 

Command/DumpApacheConfCommand.php

@@ -33,7 +33,7 @@ protected function configure()
         );
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $output->writeln(<<<EOF
 Open your .htaccess file and paste the following lines before any other rewrite rules:

Command/DumpNginxConfCommand.php

@@ -33,7 +33,7 @@ protected function configure()
         );
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $output->writeln(<<<EOF
 Open your site configuration file and paste the following lines:

DependencyInjection/Configuration.php

@@ -6,7 +6,7 @@
 
 class Configuration implements ConfigurationInterface
 {
-    public function getConfigTreeBuilder()
+    public function getConfigTreeBuilder(): TreeBuilder
     {
 
         if (method_exists(TreeBuilder::class, 'getRootNode')) {

README.md

@@ -12,7 +12,7 @@ Those conditions will ensure that a load balancer cut an instance off during a m
 
 In `composer.json` add the requirement. 
 
-The current version requires at least PHP 8.1 and a supported (as at time of release) version of Symfony (4.4, 5.4, 6.0 and 6.1).
+The current version requires at least PHP 8.1 and a supported (as at time of release) version of Symfony (4.4, 5.4, 6.4 and 7.1).
 ```json
 "require": {
     "corley/maintenance-bundle": "^0.5"

composer.json

@@ -10,10 +10,10 @@
     "target-dir": "Corley/MaintenanceBundle",
     "require": {
         "php": ">=8.1",
-        "symfony/framework-bundle": "^4.4|^5.4|^6.0",
-        "symfony/security-bundle": "^4.4|^5.4|^6.0",
-        "symfony/console": "^4.4|^5.4|^6.0",
-        "symfony/dependency-injection": "^4.4|^5.4|^6.0"
+        "symfony/framework-bundle": "^6.4|^7.0",
+        "symfony/security-bundle": "^6.4|^7.0",
+        "symfony/console": "^6.4|^7.0",
+        "symfony/dependency-injection": "^6.4|^7.0"
     },
     "require-dev": {
         "mikey179/vfsstream": "1.*",