Update nikic/php-parser requirement from ^4.2.3 to ^4.6.0

[dependabot-preview]

Updates the requirements on nikic/php-parser to permit the latest version.

Release notes

Sourced from nikic/php-parser's releases.

PHP-Parser 4.6.0

Added

• [PHP 8.0] Added support for trailing commas in parameter lists.
• [PHP 8.0] Added support for constructor promotion. The parameter visibility is stored in Node\Param::$flags.

Fixed

• Comment tokens now always follow the PHP 8 interpretation, and do not include trailing whitespace.
• As a result of the previous change, some whitespace issues when inserting a statement into a method containing only a comment, and using the formatting-preserving pretty printer, have been resolved.

Changelog

Sourced from nikic/php-parser's changelog.

Version 4.6.0 (2020-07-02)

Added

• [PHP 8.0] Added support for trailing commas in parameter lists.
• [PHP 8.0] Added support for constructor promotion. The parameter visibility is stored in Node\Param::$flags.

Fixed

• Comment tokens now always follow the PHP 8 interpretation, and do not include trailing whitespace.
• As a result of the previous change, some whitespace issues when inserting a statement into a method containing only a comment, and using the formatting-preserving pretty printer, have been resolved.

Version 4.5.0 (2020-06-03)

Added

• [PHP 8.0] Added support for the mixed type. This means mixed types are now parsed as an Identifier rather than a Name.
• [PHP 8.0] Added support for catching without capturing the exception. This means that Catch_::$var may now be null.

Version 4.4.0 (2020-04-10)

Added

• Added support for passing union types in builders.
• Added end line, token position and file position information for comments.
• Added getProperty() method to ClassLike nodes.

Fixed

• Fixed generation of invalid code when using the formatting preserving pretty printer, and inserting code next to certain nop statements. The formatting is still ugly though.
• getDocComment() no longer requires that the very last comment before a node be a doc comment. There may not be non-doc comments between the doc comment and the declaration.
• Allowed arbitrary expressions in isset() and list(), rather than just variables. In particular, this allows isset(($x)), which is legal PHP code.
• [PHP 8.0] Add support for variable syntax tweaks RFC.

Version 4.3.0 (2019-11-08)

Added

Commits

• c346bbf Release PHP-Parser 4.6.0
• 4abc531 Canonicalize to PHP 8 comment token format
• b58b19e Add constructor promotion support
• 0d2d8f9 FPPP: Support catch without variable
• 244db65 [PHP 8.0] Add trailing comma in parameter list
• 53c2753 Release PHP-Parser 4.5.0
• b5f5313 [PHP 8.0] Add exception witout variable
• 32f8966 Add support for the mixed type
• f33f081 Fix a minor typo
• bd43ec7 Release PHP-Parser 4.4.0
• Additional commits viewable in compare view

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[Ocramius]

Checked: BC compliance checks failed, CS failed - unrelated to patch.