[docs] Add generic types to NodeFinder to allow returning exact type in static analysis (#869)

Add support for DNF types (#862)

Print trailing comma in param list if supported

Always use pMaybeMultiline() for function parameters

Closes GH-861.

Mark NodeVisitorAbstract as abstract class

It doesn't actually have any abstract methods, but doesn't do
anything by itself and is intended for extension only.

Fixes #865.

Don't trim in Comment::getReformattedText()

In the past, single-line comments were stored together with the
trailing newline. Later we switched to the PHP8 comment
representation, wh

Don't trim in Comment::getReformattedText()

In the past, single-line comments were stored together with the
trailing newline. Later we switched to the PHP8 comment
representation, where the trailing newline is not part of the
comment anymore. As such, there is also no need to trim here.

This is split out from GH-867.

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Add json and ctype as required extensions in composer.json (#864)

ParserAbstract: remove undefined class in `use`

Class `PhpParser\Parser\Tokens` not exists in current version

Add additional upgrading notes for pretty printer

Improve heuristic for escaping in single quoted strings

It is idiomatic to not escape backslashes if they are followed by
a non-special character.

Don't force newline after doc string when targeting PHP >= 7.3

Add additional test case for assignment precedence

This is a case where the parentheses around the assignment *are*
important.

Avoid repeatedly downloading archive in run-php-src.sh

When doing local testing, chances are that the archive is already
present.

Treat assignments as unary operators

Assignment expressions can be viewed as unary operators where
the whole "$x =" part is the operator.

Remove inc/dec from precedence map

Inc/dec are primitive expressions that only accept a variable
operand, rather than a general expression operand.

Add a phpVersion option to the pretty printer

This is currently just used to initialize the default for short
array syntax.

The default target version in 7.0, which also means t

Add a phpVersion option to the pretty printer

This is currently just used to initialize the default for short
array syntax.

The default target version in 7.0, which also means that the
default for short arrays is flipped to on.

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Add PhpVersion class

Add visibility modifiers to constants

Closes GH-848.

Add __serialize/__unserialize to ClassMethod::$magicNames

Single blank line at eof

A PHP file without end tag must always end with a single empty line feed.

No superfluous elseif

Replaces superfluous elseif with if.

Nullable type declaration for default null value

Adds ? before type declarations for parameters with a default null value

No unused imports

Unused use statements must be removed.

Short scalar cast

Cast (boolean) and (integer) should be written as (bool) and (int), (double) and (real) as (float), (binary) as (string).

Add Parser::getLexer() method

Not sure if this is going to stick, but for now this makes it
easier to obtain the Lexer instance when creating the parser via
ParserFactory.