Version 1.40.0 (2019-04-28)

• allowed Twig\NodeVisitor\NodeVisitorInterface::leaveNode() to return "null" instead of "false" (same meaning)
• added the "apply" tag as a replacement for the "filter" tag
• allowed Twig\Loader\FilesystemLoader::findTemplate() to return "null" instead of "false" (same meaning)
• added support for "Twig\Markup" instances in the "in" test
• fixed Lexer when using custom options containing the # char
• fixed "import" when macros are stored in a template string