feat: drop php 7.3 support

Signed-off-by: Geert Eltink <[email protected]>

composer.json

@@ -31,19 +31,19 @@
         }
     },
     "require": {
-        "php": "^7.3 || ~8.0.0 || ~8.1.0",
-        "laminas/laminas-permissions-acl": "^2.6",
-        "mezzio/mezzio-authorization": "^1.0",
-        "mezzio/mezzio-router": "^3.0",
+        "php": "^7.4 || ~8.0.0 || ~8.1.0",
+        "laminas/laminas-permissions-acl": "^2.9",
+        "mezzio/mezzio-authorization": "^1.2",
+        "mezzio/mezzio-router": "^3.8",
         "psr/container": "^1.0 || ^2.0",
         "psr/http-message": "^1.0.1"
     },
     "require-dev": {
         "laminas/laminas-coding-standard": "~2.3.0",
-        "laminas/laminas-servicemanager": "^3.3",
-        "phpspec/prophecy": "^1.12",
+        "laminas/laminas-servicemanager": "^3.10",
+        "phpspec/prophecy": "^1.15",
         "phpspec/prophecy-phpunit": "^2.0",
-        "phpunit/phpunit": "^9.3"
+        "phpunit/phpunit": "^9.5.11"
     },
     "conflict": {
         "container-interop/container-interop": "<1.2.0",