feat(phpstan): Drop support php <= 7.3

Author: yamadashy

.github/workflows/tests.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
+        php-version: ['7.4', '8.0', '8.1', '8.2', '8.3']
     steps:
       - uses: actions/checkout@v4
       - name: Setup PHP
@@ -31,7 +31,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.2'
+          php-version: '8.3'
       - name: Install dependencies
         run: composer update --no-interaction --no-progress --ansi
       - name: Run coding standards check
@@ -45,7 +45,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.2'
+          php-version: '8.3'
       - name: Install dependencies
         run: composer update --no-interaction --no-progress --ansi
       - name: Run static analysis
@@ -67,7 +67,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
+        php-version: ['7.4', '8.0', '8.1', '8.2', '8.3']
         dependency-version: [prefer-lowest, prefer-stable]
     steps:
       - uses: actions/checkout@v4

composer.json

@@ -11,7 +11,7 @@
         }
     ],
     "require": {
-        "php": "^7.2 || ^8.0",
+        "php": "^7.4 || ^8.0",
         "php-parallel-lint/php-console-highlighter": "^0.3 || ^0.4 || ^0.5 || ^1.0",
         "phpstan/phpstan": "^0.12 || ^1.0 || ^2.0"
     },