Document phpVersion effect on pretty printer

Update changelog

Add PHP 8.3 to CI matrix

Add php-cs-fixer CI job

Update docs after lexer changes

Run integration test against PHP 8.3

Drop Lexer::getTokens() method

This doesn't make a lot of sense now that Lexer::tokenize() returns
the tokens.

The tokens for the last parse should be fetched via
Parser::ge

Drop Lexer::getTokens() method

This doesn't make a lot of sense now that Lexer::tokenize() returns
the tokens.

The tokens for the last parse should be fetched via
Parser::getTokens() instead.

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Use more precise Use_::TYPE_* types (#945)

For better static analysis support in consuming projects.

Indent heredoc/nowdoc when targeting PHP >= 7.3

Default pretty printer to PHP 7.4

Update PHP versions in workflow

Add more property types

Some of these are not maximally accurate due to lack of union
types.

Update phpstan baseline

Add property types

Types omitted in two places where we violate them currently:
Namespace_::$stmts can be null during parsing, and Enum_::$scalarType
can be a complex type for invali

Add property types

Types omitted in two places where we violate them currently:
Namespace_::$stmts can be null during parsing, and Enum_::$scalarType
can be a complex type for invalid programs.

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Remove emulation for unsupported PHP versions

Raise minimum PHP version to PHP 7.4

Replace startLexing() with tokenize()

For now Lexer::getTokens() still exists, but should probably be
removed.

Fixup line numbers when applying emulator patches

This fixes the test failures on PHP 7.2.

Fix PhpStan errors

Move attribute handling into parser

The Lexer now only provides the tokens to the parser, while the
parser is responsible for determining which attributes are placed
on notes. This o

Move attribute handling into parser

The Lexer now only provides the tokens to the parser, while the
parser is responsible for determining which attributes are placed
on notes. This only needs to be done when the attributes are
actually needed, rather than for all tokens.

This removes the usedAttributes lexer option (and lexer options
entirely). The attributes are now enabled unconditionally. They
have less overhead now, and the need to explicitly enable them for
some use cases (e.g. formatting-preserving printing) doesn't seem
like a good tradeoff anymore.

There are some additional changes to the Lexer interface that
should be done after this, and the docs / upgrading guide haven't
been adjusted yet.

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Make use of default actions

For the default action $$ = $1, save the closure invocation.

Don't set start attributes for whitespace

These will get overwritten later anyway.

Allow passing visitors to NodeTraverser constructor

Minor documentation updates

Early return false after VariadicPlaceholder check on CallLike::isFirstClassCallable() (#924)

VariadicPlaceholder can only occur as the first (and only) argument, so avoid a loop to check fo

Early return false after VariadicPlaceholder check on CallLike::isFirstClassCallable() (#924)

VariadicPlaceholder can only occur as the first (and only) argument, so avoid a loop to check for it.

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