Feature laravel 9 (#22)

* Support Laravel 9

* Build and test using PHP 8.1

.github/workflows/tests.yml

@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        php-version: ['7.4', '8.0']
+        php-version: ['7.4', '8.0', '8.1']
 
     steps:
       - uses: actions/checkout@v2
@@ -55,7 +55,7 @@ jobs:
 
       - name: Run SonarQube analysis
         uses: sonarsource/sonarcloud-github-action@master
-        if: matrix.php-version == '8.0'
+        if: matrix.php-version == '8.1'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONARCLOUD_TOKEN }}

composer.json

@@ -20,8 +20,8 @@
   ],
   "require": {
     "php": "^7.4|^8.0",
-    "illuminate/config": "~7.0|~8.0",
-    "illuminate/support": "~7.0|~8.0",
+    "illuminate/config": "~7.0|~8.0|~9.0",
+    "illuminate/support": "~7.0|~8.0|~9.0",
     "php-mqtt/client": "^1.0"
   },
   "require-dev": {