Merge branch 'refs/heads/master' into mod

Author: falkenhawk

doc/README.md

@@ -44,6 +44,7 @@ title: Documentation index
 
 * [Migration from PHP-DI 3.x to 4.0](migration/4.0.md)
 * [Migration from PHP-DI 4.x to 5.0](migration/5.0.md)
+* [Migration from PHP-DI 5.x to 6.0](migration/6.0.md)
 
 ### Internals