composer.json: make the dependencies on symfony components more relaxed

diff --git a/composer.json b/composer.json
index abc1538..d490494 100644 (file)
--- a/composer.json
+++ b/composer.json
@@ -19,8 +19,8 @@
         "ext-dom": "*",
         "ext-json": "*",
         "ext-xsl": "*",
-        "symfony/serializer": "2.7.*",
-        "symfony/property-access": "2.7.*"
+        "symfony/serializer": ">=2.7.0",
+        "symfony/property-access": ">=2.7.0"
     },
     "autoload": {
         "psr-4": { "Tweeper\\": "src/" }