Add support for PHP8.1 (#2)

* Add support for PHP8

* Added CI and removed infection

.circleci/config.yml

@@ -0,0 +1,121 @@
+version: 2.1
+
+commands:
+  checkout-alpine:
+    description: Install alpine requirements for checkout
+    steps:
+      - run:
+          name: "Install alpine requirements for checkout"
+          command: apk add git openssh-client curl make
+      - checkout
+
+  composer-install:
+    description: "Install dependencies"
+    steps:
+      - run:
+          name: "Execute: composer install"
+          command: |
+            if [ ! -f vendor/autoload.php ];then
+                curl https://getcomposer.org/composer-stable.phar --location --silent  --output /usr/bin/composer;
+                chmod +x /usr/bin/composer;
+                composer install --no-interaction --no-progress;
+            fi
+
+  restore-composer-cache:
+    description: "Restore vendor folder from CircleCI cache"
+    steps:
+      - restore_cache:
+          key: composer-{{ checksum "composer.json" }}
+
+  store-composer-cache:
+    description: "Store vendor folder in CircleCI cache"
+    steps:
+      - checkout-alpine
+      - restore-composer-cache
+      - composer-install
+      - save_cache:
+          key: composer-{{ checksum "composer.json" }}
+          paths:
+            - ./vendor
+      - persist_to_workspace:
+          root: .
+          paths:
+            - vendor
+
+  phpunit:
+    description: "Execute PHPUnit"
+    steps:
+      - run:
+          name: "Execute: PHPUnit"
+          command: vendor/bin/phpunit --testdox
+
+executors:
+  php74:
+    docker:
+      - image: php:7.4-cli-alpine
+    working_directory: ~/repository
+  php80:
+    docker:
+      - image: php:8.0-cli-alpine
+    working_directory: ~/repository
+  php81:
+    docker:
+      - image: php:8.1-cli-alpine
+    working_directory: ~/repository
+
+jobs:
+  composer74:
+    executor: php74
+    steps:
+      - store-composer-cache
+
+  phpunit74:
+    executor: php74
+    steps:
+      - checkout-alpine
+      - restore-composer-cache
+      - phpunit
+
+  composer80:
+    executor: php80
+    steps:
+      - store-composer-cache
+
+  phpunit80:
+    executor: php80
+    steps:
+      - checkout-alpine
+      - restore-composer-cache
+      - phpunit
+
+  composer81:
+    executor: php81
+    steps:
+      - store-composer-cache
+
+  phpunit81:
+    executor: php81
+    steps:
+      - checkout-alpine
+      - restore-composer-cache
+      - phpunit
+
+workflows:
+  Code quality PHP 7.4:
+    jobs:
+      - composer74
+      - phpunit74:
+          requires:
+            - composer74
+  Code quality PHP 8.0:
+    jobs:
+      - composer80
+      - phpunit80:
+          requires:
+            - composer80
+  Code quality PHP 8.1:
+    jobs:
+      - composer81
+      - phpunit81:
+          requires:
+            - composer81

.gitignore

@@ -2,3 +2,5 @@
 /vendor/
 .php_cs.cache
 .phpunit.result.cache
+composer.lock
+.idea

composer.json

@@ -6,8 +6,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.14",
         "phpstan/phpstan": "^0.12",
-        "phpunit/phpunit": "^8.0",
-        "infection/infection": "^0.15.3"
+        "phpunit/phpunit": "^8.0"
     },
     "license": "MIT",
     "authors": [
@@ -18,7 +17,7 @@
     ],
     "minimum-stability": "stable",
     "require": {
-        "php": "^7.2.9"
+        "php": ">=7.4"
     },
     "autoload": {
         "psr-4": {