Set composer.json versions to support ^2.8

Author: nocive

composer.json

@@ -22,12 +22,12 @@
         "php": "^7.1",
         "jean85/pretty-package-versions": "^1.0",
         "sentry/sdk": "^2.0",
-        "symfony/config": "^3.0||^4.0",
-        "symfony/console": "^3.0||^4.0",
-        "symfony/dependency-injection": "^3.0||^4.0",
-        "symfony/event-dispatcher": "^3.0||^4.0",
-        "symfony/http-kernel": "^3.0||^4.0",
-        "symfony/security-core": "^3.0||^4.0"
+        "symfony/config": "^2.8||^3.0||^4.0",
+        "symfony/console": "^2.8||^3.0||^4.0",
+        "symfony/dependency-injection": "^2.8||^3.0||^4.0",
+        "symfony/event-dispatcher": "^2.8||^3.0||^4.0",
+        "symfony/http-kernel": "^2.8||^3.0||^4.0",
+        "symfony/security-core": "^2.8||^3.0||^4.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.8",
@@ -37,7 +37,7 @@
         "phpstan/phpstan-phpunit": "^0.11",
         "phpunit/phpunit": "^7.5",
         "scrutinizer/ocular": "^1.4",
-        "symfony/expression-language": "^3.0||^4.0"
+        "symfony/expression-language": "^2.8||^3.0||^4.0"
     },
     "autoload": {
         "psr-4" : {