📦 Explicitly declare dependency to psr/http-message

[andrew-demb]

Restrict the installed version to v1 because the package compatible only with v1

Without declared dependency for now composer installs psr/http-message and it leads to the fatal error:

PHP Fatal error: Declaration of Http\Client\Socket\Stream::close() must be compatible with Psr\Http\Message\StreamInterface::close(): void in /.../vendor/code-tool/socket-client/src/Stream.php on line 78

To fix compatibility with v2 it's needed to break BC for extended classes from Stream. See PR in upstream for example changes php-http#70