* 3.x:
Fix version
Fix CS
Remove obsolete code
Use generics in ExpressionParsers
Fix precedence rules
Add deprecation notices in CHANGELOG and docs
Move Operators to ExpressionParsers, deprecate ExpressionParser
Add a script to update operator precedence documentation
Extract operators logic from ExpressionParser to their own classes
Introduce operator classes to describe operators provided by extensions instead of arrays
Bump version to 3.21
* 3.x:
Fix CHANGELOG
Fix support for ignoring syntax erros in an undefined handler in guard
Add missing CHANGELOG
Fix timezone conversion on strings
Use correct lineno for ForElseNode
Add support for registered undefined element callbacks in tests
Add UnaryInterface
Add BinaryInterface
Reimplement the cache tag in an adhoc way
Fix CS
Fix wrong array index
Fix wrong array index
Bump min PHP version to 8.1
Add even more tests
Add some tests on balanced brackets
Bump version
Prepare the 3.19.0 release
Added configuration for commonmark use in twig-extra-bundle.