Bump shivammathur/setup-php from 2.19.1 to 2.21.0

Bumps [shivammathur/setup-php](https://github.com/shivammathur/setup-php) from 2.19.1 to 2.21.0.
- [Release notes](https://github.com/shivammathur/setup-php/releases)
- [Commits](shivammathur/setup-php@2.19.1...2.21.0)

---
updated-dependencies:
- dependency-name: shivammathur/setup-php
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/CI-Experimental.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - uses: shivammathur/setup-php@2.19.1
+      - uses: shivammathur/setup-php@2.21.0
         with:
           php-version: '8.2'
           extensions: mbstring, redis, apcu

.github/workflows/CI.yml

@@ -24,7 +24,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - uses: shivammathur/setup-php@2.19.1
+      - uses: shivammathur/setup-php@2.21.0
         with:
           php-version: ${{ matrix.php }}
           extensions: mbstring, redis, apcu
@@ -55,7 +55,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - uses: shivammathur/setup-php@2.19.1
+      - uses: shivammathur/setup-php@2.21.0
         with:
           php-version: '8.0'
           extensions: mbstring, redis, apcu
@@ -105,7 +105,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - uses: shivammathur/setup-php@2.19.1
+      - uses: shivammathur/setup-php@2.21.0
         with:
           php-version: '8.0'
           extensions: mbstring, redis, apcu

composer.json

@@ -39,6 +39,10 @@
         }
     },
     "config": {
-        "sort-packages": true
+        "sort-packages": true,
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true,
+            "infection/extension-installer": true
+        }
     }
 }