Require symfony/lts ^3

Author: nicolas-grekas

composer.json

@@ -9,6 +9,7 @@
         "symfony/console": "^3.4",
         "symfony/flex": "^1.0",
         "symfony/framework-bundle": "^3.4",
+        "symfony/lts": "^3",
         "symfony/yaml": "^3.4"
     },
     "require-dev": {
@@ -41,58 +42,7 @@
         ]
     },
     "conflict": {
-        "symfony/symfony": "*",
-        "symfony/asset": "<3.4|>=4.0",
-        "symfony/browser-kit": "<3.4|>=4.0",
-        "symfony/cache": "<3.4|>=4.0",
-        "symfony/class-loader": "<3.4|>=4.0",
-        "symfony/config": "<3.4|>=4.0",
-        "symfony/console": "<3.4|>=4.0",
-        "symfony/css-selector": "<3.4|>=4.0",
-        "symfony/dependency-injection": "<3.4|>=4.0",
-        "symfony/debug": "<3.4|>=4.0",
-        "symfony/debug-bundle": "<3.4|>=4.0",
-        "symfony/doctrine-bridge": "<3.4|>=4.0",
-        "symfony/dom-crawler": "<3.4|>=4.0",
-        "symfony/dotenv": "<3.4|>=4.0",
-        "symfony/event-dispatcher": "<3.4|>=4.0",
-        "symfony/expression-language": "<3.4|>=4.0",
-        "symfony/filesystem": "<3.4|>=4.0",
-        "symfony/finder": "<3.4|>=4.0",
-        "symfony/form": "<3.4|>=4.0",
-        "symfony/framework-bundle": "<3.4|>=4.0",
-        "symfony/http-foundation": "<3.4|>=4.0",
-        "symfony/http-kernel": "<3.4|>=4.0",
-        "symfony/inflector": "<3.4|>=4.0",
-        "symfony/intl": "<3.4|>=4.0",
-        "symfony/ldap": "<3.4|>=4.0",
-        "symfony/lock": "<3.4|>=4.0",
-        "symfony/monolog-bridge": "<3.4|>=4.0",
-        "symfony/options-resolver": "<3.4|>=4.0",
-        "symfony/process": "<3.4|>=4.0",
-        "symfony/property-access": "<3.4|>=4.0",
-        "symfony/property-info": "<3.4|>=4.0",
-        "symfony/proxy-manager-bridge": "<3.4|>=4.0",
-        "symfony/routing": "<3.4|>=4.0",
-        "symfony/security": "<3.4|>=4.0",
-        "symfony/security-core": "<3.4|>=4.0",
-        "symfony/security-csrf": "<3.4|>=4.0",
-        "symfony/security-guard": "<3.4|>=4.0",
-        "symfony/security-http": "<3.4|>=4.0",
-        "symfony/security-bundle": "<3.4|>=4.0",
-        "symfony/serializer": "<3.4|>=4.0",
-        "symfony/stopwatch": "<3.4|>=4.0",
-        "symfony/templating": "<3.4|>=4.0",
-        "symfony/translation": "<3.4|>=4.0",
-        "symfony/twig-bridge": "<3.4|>=4.0",
-        "symfony/twig-bundle": "<3.4|>=4.0",
-        "symfony/validator": "<3.4|>=4.0",
-        "symfony/var-dumper": "<3.4|>=4.0",
-        "symfony/web-link": "<3.4|>=4.0",
-        "symfony/web-profiler-bundle": "<3.4|>=4.0",
-        "symfony/web-server-bundle": "<3.4|>=4.0",
-        "symfony/workflow": "<3.4|>=4.0",
-        "symfony/yaml": "<3.4|>=4.0"
+        "symfony/symfony": "*"
     },
     "extra": {
         "symfony": {