Fix named arguments when using facade

[erikn69]

Named arguments don't work when using facade because of hardcoded args in __callStatic()

Alternative to #921
Demo: https://onlinephp.io/c/d34c3
lluminate/Support/Facades/Facade.php#L345-L353

I think there was a reason for this. But not 100% sure, probably with regards to multiple instances. #921 (comment)

This PR keeps multiple instances functionality

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facade method conditional is no longer necessary, because it always pass thru, and PDF already validates that

laravel-dompdf/src/Facade/Pdf.php

Lines 66 to 68 in 3dbe06b

	if (! is_callable($callable)) {
	throw new \UnexpectedValueException("Method PDF::{$method}() does not exist.");
	}

laravel-dompdf/src/PDF.php

Line 286 in 3dbe06b

throw new \UnexpectedValueException("Method [{$method}] does not exist on PDF instance.");