fix symfony/event-dispatcher version

composer.json

@@ -26,6 +26,7 @@
         "zizaco/entrust": "5.2.x-dev",
         "prettus/l5-repository": "2.6.x",
         "spatie/laravel-pjax": "1.3.x",
+        "symfony/event-dispatcher": "v3.4.0",
         "symfony/yaml": "3.3.x",
         "league/geotools": "@stable",
         "toin0u/geotools-laravel": "^1.0",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "c8318b4b6a08d860e2332da87f030edf",
+    "content-hash": "b7a49f407f3062b69a019f23151df255",
     "packages": [
         {
             "name": "anlutro/l4-settings",
@@ -5014,30 +5014,30 @@
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v4.0.0",
+            "version": "v3.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
-                "reference": "6223fb2b68e7059e8d5843c0103999a84e7275cf"
+                "reference": "ca20b8f9ef149f40ff656d52965f240d85f7a8e4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/6223fb2b68e7059e8d5843c0103999a84e7275cf",
-                "reference": "6223fb2b68e7059e8d5843c0103999a84e7275cf",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/ca20b8f9ef149f40ff656d52965f240d85f7a8e4",
+                "reference": "ca20b8f9ef149f40ff656d52965f240d85f7a8e4",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": "^5.5.9|>=7.0.8"
             },
             "conflict": {
-                "symfony/dependency-injection": "<3.4"
+                "symfony/dependency-injection": "<3.3"
             },
             "require-dev": {
                 "psr/log": "~1.0",
-                "symfony/config": "~3.4|~4.0",
-                "symfony/dependency-injection": "~3.4|~4.0",
-                "symfony/expression-language": "~3.4|~4.0",
-                "symfony/stopwatch": "~3.4|~4.0"
+                "symfony/config": "~2.8|~3.0|~4.0",
+                "symfony/dependency-injection": "~3.3|~4.0",
+                "symfony/expression-language": "~2.8|~3.0|~4.0",
+                "symfony/stopwatch": "~2.8|~3.0|~4.0"
             },
             "suggest": {
                 "symfony/dependency-injection": "",
@@ -5046,7 +5046,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -5073,7 +5073,7 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2017-11-09T17:30:28+00:00"
+            "time": "2017-11-09T14:14:31+00:00"
         },
         {
             "name": "symfony/finder",