Composer update + symfony 5 compatibility (#99)

Author: romainnorberg

composer.json

@@ -19,10 +19,10 @@
         "php": "^7.2",
         "clue/stdio-react": "^2.0",
         "jolicode/jolinotif": "^2.0",
-        "symfony/console": "^4.0",
-        "symfony/process": "^4.0",
-        "symfony/yaml": "^4.0",
-        "yosymfony/resource-watcher": "^1.2"
+        "symfony/console": "^4.0|^5.0",
+        "symfony/process": "^4.0|^5.0",
+        "symfony/yaml": "^4.0|^5.0",
+        "yosymfony/resource-watcher": "^2.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.0"