Merge branch '2.8' into 3.2

* 2.8:
  Use PHPUnit 6.0 on PHP 7.* test lines

Author: nicolas-grekas

composer.json

@@ -23,7 +23,7 @@
         "symfony/config": "~2.8|~3.0",
         "symfony/event-dispatcher": "~2.8|~3.0",
         "symfony/http-foundation": "~3.1",
-        "symfony/http-kernel": "~3.2.2|~3.3",
+        "symfony/http-kernel": "^3.2.5",
         "symfony/polyfill-mbstring": "~1.0",
         "symfony/filesystem": "~2.8|~3.0",
         "symfony/finder": "~2.8|~3.0",
@@ -41,7 +41,7 @@
         "symfony/dom-crawler": "~2.8|~3.0",
         "symfony/polyfill-intl-icu": "~1.0",
         "symfony/security": "~2.8|~3.0",
-        "symfony/form": "~2.8.16|~3.1.9|^3.2.2",
+        "symfony/form": "^2.8.18|^3.2.5",
         "symfony/expression-language": "~2.8|~3.0",
         "symfony/process": "~2.8|~3.0",
         "symfony/security-core": "~3.2",