New upstream version 2.0.0

.github/workflows/apiref.yml

.github/workflows/backward-compatibility.yml

.github/workflows/build.yml

.github/workflows/send-pr.yml

.github/workflows/test-slevomat-coding-standard.yml

Makefile

README.md

UPGRADING.md

composer.json

phpstan-baseline.neon

phpstan.neon

src/Ast/ConstExpr/ConstExprArrayItemNode.php

src/Ast/ConstExpr/ConstExprArrayNode.php

src/Ast/ConstExpr/ConstExprFloatNode.php

src/Ast/ConstExpr/ConstExprIntegerNode.php

src/Ast/ConstExpr/ConstExprStringNode.php

src/Ast/ConstExpr/ConstFetchNode.php

src/Ast/ConstExpr/DoctrineConstExprStringNode.php

src/Ast/ConstExpr/QuoteAwareConstExprStringNode.php

src/Ast/NodeAttributes.php