Add support for PHP 8 (#424)

* Add support for PHP 8

* Fix phpstan

* Exclude Translator/TranslatorInterface.php from phpstan analysis

I don't know how to manage this error

```
% make phpstan
2 ↵ ✹
Note: Using configuration file /project/phpstan.neon.dist.
 49/49 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%

 ------
----------------------------------------------------------------------
  Line   Translator/TranslatorInterface.php
 ------
----------------------------------------------------------------------
  31     Interface Translation\Bundle\Translator\TranslatorInterface
extends
         unknown interface
Symfony\Component\Translation\TranslatorInterface.
         💡 Learn more at
https://phpstan.org/user-guide/discovering-symbols
 ------
----------------------------------------------------------------------

 --
-------------------------------------------------------------------------
     Error
 --
-------------------------------------------------------------------------
     Error message "Interface
     Translation\Bundle\Translator\TranslatorInterface extends unknown
     interface Symfony\Component\Translation\TranslatorInterface."
cannot be
     ignored, use excludes_analyse instead.
 --
-------------------------------------------------------------------------
```

* Increase lowest version

Co-authored-by: Nyholm <tobias.nyholm@gmail.com>

Author: lepiaf

composer.json

@@ -10,31 +10,31 @@
         }
     ],
     "require": {
-        "php": "^7.2",
-        "symfony/framework-bundle": "^3.4 || ^4.3 || ^5.0",
-        "symfony/validator": "^3.4 || ^4.3 || ^5.0",
-        "symfony/translation": "^3.4 || ^4.3 || ^5.0",
-        "symfony/twig-bundle": "^3.4 || ^4.3 || ^5.0",
-        "symfony/finder": "^3.4 || ^4.3 || ^5.0",
-        "symfony/intl": "^3.4 || ^4.3 || ^5.0",
+        "php": "^7.2 || ^8.0",
+        "symfony/framework-bundle": "^3.4.47 || ^4.4.20 || ^5.2.5",
+        "symfony/validator": "^3.4.47 || ^4.4.20 || ^5.2.5",
+        "symfony/translation": "^3.4.47 || ^4.4.20 || ^5.2.5",
+        "symfony/twig-bundle": "^3.4.47 || ^4.4.20 || ^5.2.5",
+        "symfony/finder": "^3.4.47 || ^4.4.20 || ^5.2.5",
+        "symfony/intl": "^3.4.47 || ^4.4.20 || ^5.2.5",
 
         "php-translation/symfony-storage": "^2.1",
         "php-translation/extractor": "^2.0",
         "nyholm/nsa": "^1.1",
-        "twig/twig": "^2.11 || ^3.0"
+        "twig/twig": "^2.14.4 || ^3.3"
     },
     "require-dev": {
         "symfony/phpunit-bridge": "^5.2",
         "bamarni/composer-bin-plugin": "^1.3",
         "php-translation/translator": "^1.0",
-        "php-http/curl-client": "^1.7",
-        "php-http/message": "^1.6",
+        "php-http/curl-client": "^1.7 || ^2.0",
+        "php-http/message": "^1.11",
         "php-http/message-factory": "^1.0.2",
-        "symfony/console": "^3.4 || ^4.3 || ^5.0",
-        "symfony/twig-bridge": "^3.4 || ^4.3 || ^5.0",
-        "symfony/asset": "^3.4 || ^4.3 || ^5.0",
-        "symfony/dependency-injection": "^3.4 || ^4.3 || ^5.0",
-        "symfony/web-profiler-bundle": "^3.4 || ^4.3 || ^5.0",
+        "symfony/console": "^3.4.47 || ^4.4.20 || ^5.2.5",
+        "symfony/twig-bridge": "^3.4.47 || ^4.4.20 || ^5.2.5",
+        "symfony/asset": "^3.4.47 || ^4.4.20 || ^5.2.5",
+        "symfony/dependency-injection": "^3.4.47 || ^4.4.20 || ^5.2.5",
+        "symfony/web-profiler-bundle": "^3.4.47 || ^4.4.20 || ^5.2.5",
         "matthiasnoback/symfony-dependency-injection-test": "^4.1",
         "matthiasnoback/symfony-config-test": "^4.1",
         "nyholm/psr7": "^1.1",

phpstan-baseline.neon

@@ -145,3 +145,5 @@ parameters:
 			count: 2
 			path: Twig/TranslationExtension.php
 
+	excludes_analyse:
+		- Translator/TranslatorInterface.php