Allow tightenco ^8.0 (and add test for PHP 8.1)

Signed-off-by: Lukas Kämmerling <[email protected]>

Author: LKaemmerling

.github/workflows/php.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        php-versions: ['7.1', '7.2', '7.3', '7.4', '8.0']
+        php-versions: [ '7.1', '7.2', '7.3', '7.4', '8.0', '8.1' ]
     steps:
     - uses: actions/checkout@v2
     - name: Setup PHP

composer.json

@@ -12,7 +12,7 @@
     "php": "^7.1|^8.0",
     "ext-json": "*",
     "guzzlehttp/guzzle": "^6.3|^7.0",
-    "tightenco/collect": "^5.5|^v6.18|^7.0"
+    "tightenco/collect": "^5.5|^v6.18|^7.0|^8.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^7.0|^8.5.5|^9.0",