bug: multi-line paste with extra line break on Windows

[CovetingEpiphany2152]

Seems to be the same issue reported in #489 but reproduced on rio 0.4.7 with windows 10.

Multi-line paste works fine in powershell. But if you ssh into a bash shell or use Windows Subsystem for Linux, multi-line paste turns every new line into two new lines instead.

[CovetingEpiphany2152]

I found a Wezterm config that handles this here.

On Windows we're in a bit of a frustrating situation: pasting into Windows console programs requires CRLF otherwise there is no newline at all, but when in WSL, pasting with CRLF gives excess blank lines.
In practice, the default setting means that unix shells and vim will get the unix newlines in their pastes (which is the UX most users will want) and cmd.exe will get CRLF.