Remove L8 support (#3)

Author: lukinovec

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        laravel: [8, 9, 10]
+        laravel: [9, 10]
 
     steps:
     - uses: actions/checkout@v2

composer.json

@@ -19,11 +19,11 @@
     },
     "require": {
         "php": "^8.1",
-        "illuminate/support": "^8.24|^9.0|^10.0",
+        "illuminate/support": "^9.0|^10.0",
         "archtechx/enums": "^0.3.2"
     },
     "require-dev": {
-        "orchestra/testbench": "^6.9|^7.0|^8.0",
+        "orchestra/testbench": "^7.0|^8.0",
         "pestphp/pest": "^1.2|^2.0",
         "pestphp/pest-plugin-laravel": "^1.0|^2.0"
     },