Add array shape for gmp_div_qr()

[BenMorel]

No description provided.

[BenMorel]

CI fails with:

Function \gmp_div_qr has mismatch in phpdoc return type and signature return type.
Signature has array but phpdoc has GMP}

Don't stubs support array shapes like array{GMP, GMP}?

[isfedorov]

@BenMorel Unfortunately not yet. The test was written at the times when PhpStorm didn't support such array shapes yet. But I think now we can reconsider it and update the test

[VincentLanglet]

@BenMorel If you want to fix your test, you just need to update this line
https://github.com/JetBrains/phpstorm-stubs/blob/master/tests/Model/PHPFunction.php#L140
to

} elseif ($type instanceof List_ || $type instanceof ArrayShape) {