XOL-4975 Support for Symfony 3 (#12)

* XOL-4975 removed `composer.lock` from version control

* XOL-4975 fixed Symfony 2.8 deprecations

* XOL-4975 upgraded to phpunit 7

* XOL-4975 fixed phpunit config issue

* XOL-4975 fixed phpunit `setUp` function signature

* XOL-4975 fixed phpunit `setUp` function signature

* XOL-4975 fixed phpunit `tearDown` function signature

* XOL-4975 do not fail on warnings

.gitignore

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

.travis.yml

@@ -0,0 +1,18 @@
+language: php
+
+php:
+  - 7.2
+  - 7.3
+  - 7.4
+
+env:
+  - SYMFONY_VERSION="2.1"
+  - SYMFONY_VERSION="3.0"
+
+before_script:
+  - composer self-update
+  - composer --version
+  - composer require symfony/framework-bundle:${SYMFONY_VERSION} --no-update
+  - composer install -n --dev --prefer-source
+
+script: phpunit --configuration phpunit.xml.dist

composer.json

@@ -2,8 +2,8 @@
     "name": "xola/reportwriter-bundle",
     "description": "A generic report writer",
     "require": {
-        "php": ">=5.6",
-        "symfony/framework-bundle": "~2.1",
+        "php": ">=7.1",
+        "symfony/framework-bundle": ">=2.1 <4.0",
         "psr/log": "~1.0",
         "phpoffice/phpspreadsheet": "^1.3"
     },
@@ -20,6 +20,6 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.4"
+        "phpunit/phpunit": "~7"
     }
 }