* 3.x:
Remove obsolete code
Update CHANGELOG
Sandbox ArrayAccess and do sandbox checks before isset() checks
Fix sandbox handling for __toString()
Fix mistake in docs for `keys` filter
Update CHANGELOG
[String] Add SpanishInflector support for singular and plural
Add `find` to `Filters` docs
Remove duplicate test case
Revert "minor #4411 Add return type to getDebugInfo (ruudk)"
Add `$this` return type to Template::unwrap
Add link to TwigQI in docs "You might also be interested in" section
Add return type to compiled macro