Added $outputLength parameter to async method.

[HarshithCariappa]

When the Output Length is passed to the $pool->add method it ignores it and throws return length is too long, When ParentRuntime::createProcess is called directly with the $longerContentLength then it works perfectly , Since the async method calles the ParentRuntime::createProcess internally I added a parameter to accept the content length in async method and passed it to ParentRuntime::createProcess .

[ayushcedcoss]

vf

[spatie-bot]

Dear contributor,

because this pull request seems to be inactive for quite some time now, I've automatically closed it. If you feel this pull request deserves some attention from my human colleagues feel free to reopen it.