Raised minimum php version to 7.3 (#10)

* Raised minimum php version to 7.3
* Updated phpunit version
* Removed .idea directory

Author: MaximilianKresse

.github/workflows/code-style.yml

@@ -11,7 +11,7 @@ jobs:
       - name: Install php
         uses: shivammathur/setup-php@v2
         with:
-          php-version: "7.2"
+          php-version: "7.3"
 
       - name: Install dependencies
         run: composer update --dev --no-interaction --prefer-dist --no-progress --no-suggest --ansi
@@ -32,7 +32,7 @@ jobs:
       - name: Install php
         uses: shivammathur/setup-php@v2
         with:
-          php-version: "7.2"
+          php-version: "7.3"
 
       - name: Install dependencies
         run: composer update --dev --no-interaction --prefer-dist --no-progress --no-suggest --ansi

.github/workflows/tests.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        php: ['7.2', '7.3', '7.4', '8.0', '8.1']
+        php: ['7.3', '7.4', '8.0', '8.1']
     steps:
       - name: Checkout
         uses: actions/checkout@v2

.gitignore

@@ -1,3 +1,4 @@
 vendor
 /composer.phar
-/**/.phpunit.result.cache
+/**/.phpunit.result.cache
+/.idea