php 8 support

Author: timoladoyinbo

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [7.4]
+        php: [7.4, 8.0]
         laravel: [8.*, 7.*, 6.*]
         include:
           - laravel: 8.*
@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2.4.0
 
       - name: Cache dependencies
         uses: actions/cache@v1

composer.json

@@ -20,8 +20,7 @@
         }
     ],
     "require": {
-        "php": "^7.4",
-        "ext-json": "^7.4",
+        "php": "^7.4|^8.0",
         "guzzlehttp/guzzle": "^7.3",
         "illuminate/contracts": "^7.15|^8.0",
         "illuminate/http": "^7.15|^8.0",