support laravel 8

Author: timoladoyinbo

composer.json

@@ -1,6 +1,6 @@
 {
     "name": "digikraaft/laravel-paystack-subscription",
-    "description": "A simple interface to Paystack's subscription billing services. It takes off the pain of implementing subscription management.",
+    "description": "A simple interface to Paystack's subscription billing services. It takes the pain of implementing subscription management off you.",
     "keywords": [
         "digikraaft",
         "laravel-paystack-subscription",
@@ -26,13 +26,13 @@
         "digikraaft/paystack-php": "^1.0",
         "dompdf/dompdf": "^0.8.5",
         "guzzlehttp/guzzle": "^6.5",
-        "illuminate/contracts": "^7.15",
-        "illuminate/database": "^7.15",
-        "illuminate/http": "^7.15",
-        "illuminate/notifications": "^7.15",
-        "illuminate/routing": "^7.15",
-        "illuminate/support": "^7.15",
-        "illuminate/view": "^7.15",
+        "illuminate/contracts": "^7.15|^8.0",
+        "illuminate/database": "^7.15|^8.0",
+        "illuminate/http": "^7.15|^8.0",
+        "illuminate/notifications": "^7.15|^8.0",
+        "illuminate/routing": "^7.15|^8.0",
+        "illuminate/support": "^7.15|^8.0",
+        "illuminate/view": "^7.15|^8.0",
         "nesbot/carbon": "^2.35",
         "symfony/http-kernel": "^5.1"
     },