Bump PHP version and composer update

There are security advisories, and PHP <7.4 is no longer supported.

.gitignore

@@ -17,3 +17,8 @@
 ###> symfony/web-server-bundle ###
 /.web-server-pid
 ###< symfony/web-server-bundle ###
+
+###> phpunit/phpunit ###
+/phpunit.xml
+.phpunit.result.cache
+###< phpunit/phpunit ###

composer.json

@@ -5,12 +5,17 @@
     "license": "MIT",
     "type": "project",
     "require": {
-        "php": ">=7.2",
+        "php": ">=7.4",
         "ext-ctype": "*",
         "ext-iconv": "*",
+        "doctrine/annotations": "^1.0",
         "doctrine/cache": "^1.8",
+        "doctrine/doctrine-bundle": "^2.6",
+        "doctrine/doctrine-migrations-bundle": "^3.2",
+        "doctrine/orm": "^2.11",
         "dsinn/srcom-api-php": "dev-master@dev",
         "kevinrob/guzzle-cache-middleware": "^3.2",
+        "phpdocumentor/reflection-docblock": "^5.3",
         "sensio/framework-extra-bundle": "^5.1",
         "symfony/asset": "4.4.*",
         "symfony/console": "4.4.*",
@@ -21,10 +26,12 @@
         "symfony/form": "4.4.*",
         "symfony/framework-bundle": "4.4.*",
         "symfony/monolog-bundle": "^3.1",
-        "symfony/orm-pack": "*",
         "symfony/process": "4.4.*",
+        "symfony/property-access": "4.4.*",
+        "symfony/property-info": "4.4.*",
+        "symfony/proxy-manager-bridge": "4.4.*",
         "symfony/security-bundle": "4.4.*",
-        "symfony/serializer-pack": "*",
+        "symfony/serializer": "4.4.*",
         "symfony/swiftmailer-bundle": "^3.1",
         "symfony/translation": "4.4.*",
         "symfony/twig-bundle": "4.4.*",
@@ -39,17 +46,25 @@
         }
     ],
     "require-dev": {
-        "symfony/debug-pack": "*",
+        "phpunit/phpunit": "^9.5",
+        "symfony/browser-kit": "4.4.*",
+        "symfony/css-selector": "4.4.*",
+        "symfony/debug-bundle": "4.4.*",
         "symfony/maker-bundle": "^1.0",
-        "symfony/profiler-pack": "*",
-        "symfony/test-pack": "*",
+        "symfony/phpunit-bridge": "^6.0",
+        "symfony/stopwatch": "4.4.*",
+        "symfony/web-profiler-bundle": "4.4.*",
         "symfony/web-server-bundle": "4.4.*"
     },
     "config": {
         "preferred-install": {
             "*": "dist"
         },
-        "sort-packages": true
+        "sort-packages": true,
+        "allow-plugins": {
+            "symfony/flex": true,
+            "ocramius/package-versions": true
+        }
     },
     "autoload": {
         "psr-4": {