Important: This release contains an important security fix! Please make sure to update ASAP and to check the documentation because changes in your template files might be necessary.

Whats Changed
[BUGFIX] set correct return type by @lukasniestroj
[BUGFIX] avoid type error if file do not exist by @huersch
[SECURITY] Implement children escaping by @helhum and @s2b
[FEATURE] Add Slot ViewHelper to render slots in components by @helhum and @s2b
[TASK] Add tests for parameter escaping by @s2b
[FEATURE] Command to check for possible escaping issues by @s2b
[DOC] Add documentation for XSS mitigation by @s2b