v0.8.13

1. Update mintty to 3.0.0.
2. Update fatty to 5a9c340.

If your wsl-terminal version number is higher than 0.8.0, can upgrade it with ./cmdtool update (usage).

sha256sum	filename
ff19da05b7b18d0caa53f8a63477a0a5f5029c5632c2a69f601616daaa1e0b92	wsl-terminal-0.8.13.7z
66e5ee175c61a6d53fb02fd80e2252f7220f62f0115060cd34767e70ac77eb32	wsl-terminal-0.8.13.zip
3dcf703df0faf75322136c82fe4ce8180b6afe3b1c4f5cb02e99bcf7f678e2a4	wsl-terminal-tabbed-0.8.13.7z
2b179e7919b1f4f14dc54daa03a086a97599563b259f1227d6074a407c81bc37	wsl-terminal-tabbed-0.8.13.zip