feat(deps): add php8 support (#5)

Author: sudkumar

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [7.1, 7.2, 7.3, 7.4]
+        php: [7.1, 7.2, 7.3, 7.4, 8.0]
 
     name: P${{ matrix.php }}
 

composer.json

@@ -27,11 +27,11 @@
         "email": "luckysud4@gmail.com"
     },
     "require": {
-        "php": ">=7.1",
+        "php": ">=7.1|^8.0",
         "guzzlehttp/guzzle": "^6.5.5|^7.0.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "^7.5|^8.4.0"
+        "phpunit/phpunit": "^7.5|^8.4.0|^9.4"
     },
     "extra": {
         "branch-alias": {