Merge branch '2.7' into 2.8

* 2.7:
  Use PHPUnit 6.0 on PHP 7.* test lines

Author: nicolas-grekas

composer.json

@@ -18,14 +18,14 @@
     "require": {
         "php": ">=5.3.9",
         "symfony/event-dispatcher": "~2.1|~3.0.0",
-        "symfony/intl": "~2.4|~3.0.0",
+        "symfony/intl": "~2.7.25|^2.8.18|~3.2.5",
         "symfony/options-resolver": "~2.6",
         "symfony/polyfill-mbstring": "~1.0",
         "symfony/property-access": "~2.3|~3.0.0"
     },
     "require-dev": {
         "doctrine/collections": "~1.0",
-        "symfony/validator": "~2.8|~3.0.0",
+        "symfony/validator": "^2.8.18|~3.2.5",
         "symfony/dependency-injection": "~2.3|~3.0.0",
         "symfony/http-foundation": "~2.2|~3.0.0",
         "symfony/http-kernel": "~2.4|~3.0.0",