feat!: upgrade min. php version to 8.4 (#86)

* feat: upgrade min php to 7.4, upgrade packages

* chore: update ci/cd, docs, supporting config to php 8.4

* chore: update rest of the docs, supporting config to php 8.4

docs/docker-development.md

@@ -26,7 +26,7 @@ docker compose exec php composer lint
 ### docker/Dockerfile
 
 ```dockerfile
-FROM php:8.2-cli-alpine
+FROM php:8.4-cli-alpine
 
 # Install system dependencies
 RUN apk add --no-cache \
@@ -90,9 +90,9 @@ services:
     tty: true
     command: tail -f /dev/null
 
-  # Optional: PHP 8.3 for testing compatibility
+  # Optional: PHP 8.5 for testing compatibility
   php83:
-    image: php:8.3-cli-alpine
+    image: php:8.5-cli-alpine
     volumes:
       - ..:/app
     working_dir: /app
@@ -253,7 +253,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: ['8.2', '8.3']
+        php: ['8.4', '8.5']
 
     steps:
       - uses: actions/checkout@v4

docs/plugin-development.md

@@ -28,7 +28,7 @@ Plugins extend the GDPR processor's functionality without modifying core code. U
 ### When to Use Plugins vs. Configuration
 
 | Scenario | Use Plugin | Use Configuration |
-|----------|-----------|-------------------|
+| -------- | --------- | ----------------- |
 | Add regex patterns | ✅ (via `getPatterns()`) | ✅ (via constructor) |
 | Custom transformation logic | ✅ | ❌ |
 | Conditional processing | ✅ | ❌ |
@@ -126,7 +126,7 @@ interface MaskingPluginInterface
 ### Method Reference
 
 | Method | Purpose | When Called |
-|--------|---------|-------------|
+| ------ | ------- | ----------- |
 | `getName()` | Unique identifier for debugging | On registration |
 | `preProcessContext()` | Modify context before masking | Before core masking |
 | `preProcessMessage()` | Modify message before masking | Before core masking |
@@ -266,7 +266,7 @@ class LowPriorityPlugin extends AbstractMaskingPlugin
 ### Recommended Priority Ranges
 
 | Range | Use Case | Example |
-|-------|----------|---------|
+| ----- | -------- | ------- |
 | 1-50 | Security/validation | Input sanitization |
 | 50-100 | Standard processing | Pattern masking |
 | 100-150 | Business logic | Domain-specific rules |

docs/troubleshooting.md

@@ -22,7 +22,7 @@ This guide helps diagnose and resolve common issues with the Monolog GDPR Filter
 
 ```bash
 # Check PHP version
-php -v  # Must be 8.2 or higher
+php -v  # Must be 8.4 or higher
 
 # Clear Composer cache
 composer clear-cache