Allow Symfony 4 components (#172)

Author: z38

.travis.yml

@@ -54,6 +54,8 @@ matrix:
       env: [SF_EVT_DISPATCHER_VERSION="3.2.*", SF_OPT_RESOLVER_VERSION="3.2.*"]
     - php: 7.1
       env: [SF_EVT_DISPATCHER_VERSION="^3.3", SF_OPT_RESOLVER_VERSION="^3.3"]
+    - php: 7.1
+      env: [SF_EVT_DISPATCHER_VERSION="^4.0", SF_OPT_RESOLVER_VERSION="^4.0"]
 
     - php: hhvm
       env: [SF_EVT_DISPATCHER_VERSION="2.7.*", SF_OPT_RESOLVER_VERSION="2.7.*"]
@@ -67,6 +69,8 @@ matrix:
       env: [SF_EVT_DISPATCHER_VERSION="3.2.*", SF_OPT_RESOLVER_VERSION="3.2.*"]
     - php: hhvm
       env: [SF_EVT_DISPATCHER_VERSION="^3.3", SF_OPT_RESOLVER_VERSION="^3.3"]
+    - php: hhvm
+      env: [SF_EVT_DISPATCHER_VERSION="^4.0", SF_OPT_RESOLVER_VERSION="^4.0"]
 
   allow_failures:
     - php: nightly

composer.json

@@ -15,8 +15,8 @@
     "require": {
         "php": ">=5.6.0",
         "ext-curl": "*",
-        "symfony/event-dispatcher": ">=2.4,<4",
-        "symfony/options-resolver": ">=2.6,<4",
+        "symfony/event-dispatcher": ">=2.4,<5",
+        "symfony/options-resolver": ">=2.6,<5",
         "guzzlehttp/guzzle": "~6.0",
         "psr/log": "~1.0",
         "doctrine/cache": "^1.6",