Require PHP 8.0 (#39)

* Require PHP 8.0

* Run CI on PHP 8 by default

* Fix $GLOBALS usage for PHP 8.1

* Get rid of unnecessary PHP 8.0 checks

.github/workflows/integrate.yaml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "7.4"
+          - "8.0"
 
     steps:
       - name: "Checkout"
@@ -62,8 +62,8 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "7.4"
           - "8.0"
+          - "8.1"
 
     steps:
       - name: "Checkout"
@@ -88,13 +88,8 @@ jobs:
           restore-keys: ${{ runner.os }}-php-${{ matrix.php-version }}-${{ matrix.dependencies }}-composer-
 
       - name: "Install dependencies"
-        if: ${{ matrix.php-version != '8.0' }}
         run: "composer update --no-interaction --no-progress"
 
-      - name: "Install dependencies PHP 8.0"
-        if: ${{ matrix.php-version == '8.0' }}
-        run: "composer update --no-interaction --no-progress --ignore-platform-reqs"
-
       - name: "Run tests"
         timeout-minutes: 3
         run: "vendor/bin/phpunit --no-coverage --no-logging"
@@ -107,7 +102,7 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "7.4"
+          - "8.0"
 
     steps:
       - name: "Checkout"
@@ -153,7 +148,7 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "7.4"
+          - "8.0"
 
     steps:
       - name: "Checkout"
@@ -190,7 +185,7 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "7.4"
+          - "8.0"
 
     steps:
       - name: "Checkout"

composer.json

@@ -11,7 +11,7 @@
         }
     ],
     "require": {
-        "php": "^7.4 || ^8.0",
+        "php": ">=8.0",
         "nikic/php-parser": "^v4.13.1",
         "phpstan/phpstan": "^1.1.1"
     },

tests/TestAsset/UnusedVariableRule/fixture.php

@@ -74,7 +74,7 @@ function foo($ref)
     $function2();
 
     $_SESSION = ['var19' => 1];
-    $GLOBALS = null;
+    $GLOBALS['foo'] = 'bar';
 }
 
 class Test