upgrade all dependencies to work with php81

.circleci/config.yml

@@ -0,0 +1,33 @@
+# PHP CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-php/ for more details
+#
+version: 2.1
+
+commands:
+  build:
+    steps:
+      - checkout
+      - run: sudo apt update
+      - run:
+          name: Composer Install
+          command: |
+            composer install -n --prefer-dist --no-scripts
+      - run:
+          name: Run Tests
+          command: |
+            ./vendor/bin/phpunit
+
+jobs:
+  php81:
+    docker:
+      - image: cimg/php:8.1
+    resource_class: small
+    steps:
+      - build
+
+workflows:
+  version: 2
+  eloquent-model-validation:
+    jobs:
+      - php81

.gitignore

@@ -1,5 +1,6 @@
 /vendor
-composer.lock
 tags
 build
 .phpunit.result.cache
+.idea/
+.phpunit.cache/

composer.json

@@ -10,16 +10,14 @@
         }
     ],
     "require": {
-        "php": "^7.3 || ^8.0",
-        "illuminate/support": "^8.0",
-        "illuminate/database": "^8.40",
-        "illuminate/validation": "^8.0"
+        "php": "^8.1",
+        "illuminate/support": "^9",
+        "illuminate/database": "^9",
+        "illuminate/validation": "^9"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.0 || ^9.0",
-        "mockery/mockery": "^1.4.1",
-        "squizlabs/php_codesniffer": "^3.1",
-        "php-coveralls/php-coveralls": "^2.4"
+        "phpunit/phpunit": "^10.5.20",
+        "mockery/mockery": "^1.4.1"
     },
     "autoload": {
         "psr-4": {