3.0.0-beta1

test: Improve coverage for StringWrapper
style: php-cs-fixer
chore: metadata
Merge pull request #3 from prigaux/patch-1
stream_read must return "" on eof (false means error)
fix PHP 8.0 ValueError: fread(): Argument #2 ($length) must be greater than 0
Update metadata and workflows for PHP 8 support
Development mode for Stream_Wrapper-3.0.0alpha5