Bumped child process packages and open up Windows support again#64

WyriHaximus wants to merge 2 commits intoreactphp:0.2.xreactphp/filesystem:0.2.xfrom

WyriHaximus-secret-labs:support-latest-version-child-processWyriHaximus-secret-labs/filesystem:support-latest-version-child-processCopy head branch name to clipboard