minor #1280 [README] Fixed the minimal PHP version (lyrixx)

This PR was merged into the 1.3 branch.

Discussion
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[README] Fixed the minimal PHP version

Fixes #1279

Commits
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0a93a776 [README] Fixed the minimal PHP version

README.rst

@@ -18,7 +18,7 @@ components`_:
 
     $app->run();
 
-Silex works with PHP 5.3.3 or later.
+Silex works with PHP 5.3.9 or later.
 
 Installation
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