Fix travis link

shabbyrobe · web-flow · commit bf49a7e01f45 · 2019-12-03T14:03:13.000+11:00
diff --git a/README.rst b/README.rst
@@ -2,6 +2,7 @@
 ======================================================================
 
 .. image:: https://travis-ci.org/docopt/docopt.php.svg?branch=master
+    :target: https://travis-ci.org/docopt/docopt.php
 
 This is a straight PHP transliteration of Vladimir Keleshev's brilliant
 `docopt <https://github.com/docopt/docopt/>`_ Python library. There are a
