Add missing void return types (#997)

Remove ParserFactory::create()

Don't try to keep backwards-compatibility with the old factory
style, which doesn't map cleanly onto supported options (we only
have ONLY_PHP7/PREFER_P

Remove ParserFactory::create()

Don't try to keep backwards-compatibility with the old factory
style, which doesn't map cleanly onto supported options (we only
have ONLY_PHP7/PREFER_PHP7, which should probably create a Php8
parser in terms of how they are used, but this would no longer
match their names).

Instead, I have backported the new createForNewestSupportedVersion()
and createForHostVersion() methods to PHP-Parser 4.

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Explicit test new ParserFactory methods

Format tests as well

The unnecessary parentheses for "new" are a bit annoying, but I
can live with it...

Remove PHP 5 parser

updates via "rectorphp/rector" (#573)

- "global" -> remove unused "use" statements
- "phpunit" -> fix "@covers" comments
- "phpunit" -> replace "->will($this->returnValue()" with "->

updates via "rectorphp/rector" (#573)

- "global" -> remove unused "use" statements
- "phpunit" -> fix "@covers" comments
- "phpunit" -> replace "->will($this->returnValue()" with "->willReturn()"
- "UseTest.php" -> add missing namespace
- "composer.json" -> use "autoload-dev"
- remove -> "require_once" usage in the tests (use autoload-dev via composer.json)

-> most of the changes are done automatically by "https://github.com/rectorphp/rector"

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[CS] Use ::class notation instead of string

Conflicts:
test/PhpParser/ParserFactoryTest.php
test/PhpParser/ParserTest.php

add strict_types to tests + fix explode type

Bump phpunit version (#381)

Add dummy ParserFactory test

:/