* 0.9.10
+Backward incompatibilities:
+
+ * The Escaper extension is enabled by default, which means that all displayed
+ variables are now automatically escaped. You can revert to the previous
+ behavior by removing the extension via $env->removeExtension('escaper').
+
+Changes:
+
* added a syntax error exception when parent block is used on a template that does not extend another one
* made the Escaper and Optimizer extensions enabled by default
* fixed sandbox extension when used with auto output escaping