Add contains tilda in ssh key
Fix replace tilde in ssh key
Fix test of serial mode
Fix Executor on serial mode
Merge pull request #35 from ngyuki/pr-fix-replace-tilde

Fix replace tilde in ssh key
Merge pull request #36 from ngyuki/pr-fix-serial-mode

Fix serial mode on Windows
Update a logic for killing child process
Update version
Fix bug in the self-update command