Upgrade minimum PHP to 7.3

Author: ddebin

.php-cs-fixer.php

@@ -16,10 +16,13 @@
     '@PhpCsFixer:risky' => true,
     '@PHP71Migration' => true,
     '@PHP71Migration:risky' => true,
+    '@PHP73Migration' => true,
     '@PHPUnit75Migration:risky' => true,
     '@PHPUnit7x5Migration:risky' => true,
     '@PHPUnit84Migration:risky' => true,
     '@PHPUnit8x4Migration:risky' => true,
+    '@PHPUnit91Migration:risky' => true,
+    '@PHPUnit9x1Migration:risky' => true,
     'array_syntax' => ['syntax' => 'short'],
     'php_unit_test_class_requires_covers' => false,
     'backtick_to_shell_exec' => true,

composer.json

@@ -22,7 +22,7 @@
         }
     ],
     "require": {
-        "php": "^7.2 || ^8.0",
+        "php": "^7.3 || ^8.0",
         "ext-json": "*",
         "ext-pdo": "*"
     },
@@ -31,7 +31,7 @@
         "phpstan/phpstan": "^1.12",
         "phpstan/phpstan-phpunit": "^1.0",
         "phpstan/phpstan-strict-rules": "^1.0",
-        "phpunit/phpunit": "^8.4 || ^9.0 || ^10.0"
+        "phpunit/phpunit": "^9.1 || ^10.0"
     },
     "config": {
         "sort-packages": true