feature #7 Fix Symfony 3 support (sstok)

This PR was merged into the master branch.

Discussion
----------

|Q            |A  |
|---          |---|
|Bug Fix      |yes|
|New Feature  |yes|
|Deprecations |no |
|Fixed Tickets|#6 |
|License      |MIT|

Commits
-------

c638eb7 Bump branch-alias
c273229 Add "symfony/dependency-injection" as explicit dependecy with higher constraint
b3b7dbd Allow Symfony 3
3dec068 Remove compatibility checker

Author: sstok

.travis.yml

@@ -14,8 +14,9 @@ matrix:
           env: DEPENDENCIES='low'
         - php: 5.6
           env: DEPENDENCIES='dev'
+        - php: 5.6
+          env: SYMFONY_VERSION=3.0.*
     allow_failures:
-        - php: 7.0
         - env: DEPENDENCIES='dev'
     fast_finish: true
 
@@ -25,7 +26,13 @@ cache:
     directories:
         - $HOME/.composer/cache/files
 
+before_install:
+    - composer selfupdate
+    - if [ "$SYMFONY_VERSION" != "" ]; then composer require "symfony/symfony:${SYMFONY_VERSION}" --no-update; fi;
+
 install:
+    - export SYMFONY_DEPRECATIONS_HELPER=strong
+    - export COMPOSER_ROOT_VERSION=dev-master
     - if [ "$DEPENDENCIES" == "dev" ]; then perl -pi -e 's/^}$/,"minimum-stability":"dev"}/' composer.json; fi;
     - if [ "$DEPENDENCIES" != "low" ]; then travis_retry composer update; fi;
     - if [ "$DEPENDENCIES" == "low" ]; then travis_retry composer update --prefer-lowest; fi;

composer.json

@@ -10,13 +10,14 @@
     ],
     "require": {
         "php": ">=5.3",
-        "symfony/framework-bundle": "~2.3",
-        "symfony/expression-language": "~2.4",
+        "symfony/framework-bundle": "~2.3|~3.0",
+        "symfony/dependency-injection": "~2.4|~3.0",
+        "symfony/expression-language": "~2.4|~3.0",
         "knplabs/knp-menu-bundle": "^2.0.0"
     },
     "require-dev": {
-        "matthiasnoback/symfony-config-test": "~1.1.0",
-        "matthiasnoback/symfony-dependency-injection-test": "~0.7.4",
+        "matthiasnoback/symfony-config-test": "^1.1.0",
+        "matthiasnoback/symfony-dependency-injection-test": "^0.7.6",
         "symfony/phpunit-bridge": "~2.7"
     },
     "autoload": {
@@ -31,7 +32,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.2-dev"
+            "dev-master": "1.3-dev"
         }
     }
 }

tests/DependencyInjection/NavigationExtensionTest.php

@@ -102,10 +102,6 @@ public function testBreadcrumbParentsAreResolved()
 
     public function testBreadcrumbsAreRegisteredWithExpression()
     {
-        if (!class_exists('Symfony\Component\DependencyInjection\ExpressionLanguage')) {
-            $this->markTestSkipped('Requires at least version 2.4 of the DependencyInjection component.');
-        }
-
         $this->load(array(
             'breadcrumbs' => array(
                 'webhosting' => array(