Allow Symfony 2.8

.gitignore

@@ -1,2 +1,3 @@
+/composer.lock
 /vendor/
 /bin/

.travis.yml

@@ -8,7 +8,8 @@ php:
 # Commands to be run before your environment runs.
 before_script:
   - composer self-update
-  - composer install --prefer-source --no-interaction
+  - if [ "$SYMFONY" != "" ]; then composer require "symfony/symfony:${SYMFONY}" --no-update; fi;
+  - composer update --prefer-source --no-interaction ${COMPOSER_FLAGS}
 
 
 # Commands you want to run that will verify your build.
@@ -28,8 +29,15 @@ matrix:
 #    - php: 7
 #    - php: hhvm
   fast_finish: true
+  include:
+    - php: '7.0'
+      env: COMPOSER_FLAGS="--prefer-lowest"
+    - php: '7.0'
+      env: SYMFONY=2.8.*
+    - php: '7.0'
+      env: SYMFONY=3.0.*
 
 # Customize when the notification emails are sent.
 notifications:
     on_success: never
-    on_failure: always
+    on_failure: always

composer.json

@@ -2,15 +2,15 @@
     "name": "algatux/influxdb-bundle",
     "description": "InfluxDB Bundle",
     "require": {
-        
+
         "php": ">=7.0",
-        
+
         "influxdb/influxdb-php": "^1.2",
-        "symfony/dependency-injection": "^3.0",
-        "symfony/config": "^3.0",
-        "symfony/http-kernel": "^3.0",
+        "symfony/dependency-injection": "^2.8 || ^3.0",
+        "symfony/config": "^2.8 || ^3.0",
+        "symfony/http-kernel": "^2.8 || ^3.0",
         "doctrine/collections": "^1.3",
-        "symfony/event-dispatcher": "^3.0"
+        "symfony/event-dispatcher": "^2.8 || ^3.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.1",