Add phpstan - level 6

.github/workflows/phpstan.yml

@@ -0,0 +1,39 @@
+name: PHPStan
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  cs:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: true
+      matrix:
+        php: [ '7.4', '8.0', '8.1', '8.2' ]
+        stability: [ prefer-stable ]
+
+    name: PHP ${{ matrix.php }} - ${{ matrix.stability }}
+
+    steps:
+      - name: Checkout the code
+        uses: actions/checkout@v3
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          tools: composer:v2
+
+      - name: Install composer dependencies
+        uses: nick-invision/retry@v2
+        with:
+          command: composer update --${{ matrix.stability }} --prefer-dist --no-interaction --no-plugins --no-scripts --no-progress
+          max_attempts: 5
+          timeout_minutes: 5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Run PHP CodeSniffer
+        run: vendor/bin/phpstan

.github/workflows/tests.yml

@@ -1,4 +1,4 @@
-name: PHPUnit
+name: Tests
 
 on:
   push:

README.md

@@ -1,6 +1,7 @@
 # Phone Verification
 
-[![Build Status](https://github.com/alexeygeno/phone-verification-php/workflows/PHPUnit/badge.svg)](https://github.com/alexeygeno/phone-verification-php/actions)
+[![Build Status](https://github.com/alexeygeno/phone-verification-php/workflows/Tests/badge.svg)](https://github.com/alexeygeno/phone-verification-php/actions)
+[![Build Status](https://github.com/alexeygeno/phone-verification-php/workflows/PHPStan/badge.svg)](https://github.com/alexeygeno/phone-verification-php/actions)
 [![Build Status](https://github.com/alexeygeno/phone-verification-php/workflows/CodeSniffer/badge.svg)](https://github.com/alexeygeno/phone-verification-php/actions)
 [![Coverage Status](https://coveralls.io/repos/github/alexeygeno/phone-verification-php/badge.svg)](https://coveralls.io/github/alexeygeno/phone-verification-php)
 
@@ -15,7 +16,6 @@ This extensible and configurable library allows to set this up just with a few l
 - [ Composer](https://getcomposer.org/)
 - Supported storage clients: [ Predis](https://github.com/predis/predis), [ MongoDb](https://github.com/mongodb/mongo-php-library)
 - Supported sender SDKs: [ Twilio](https://github.com/twilio/twilio-php), [ MessageBird](https://github.com/messagebird/php-rest-api), [Vonage ](https://github.com/Vonage/vonage-php-sdk-core)
-- A smile on your face :smile:
 
 ## Installation
 ```shell