Merge pull request #5 from x-qdo/proper_support_utf8

Proper support utf8

Merge pull request #4 from x-qdo/increase_granularity

Increase metrics granularity to determine sessions switch

write tty metrics csv headers

Merge pull request #1 from x-qdo/releaser

Release and s3 changes

Handle SIGHUP to save session recording

Microsoft decided to use SIGHUP [by default][1] to kill child PTY.

[1]: https://github.com/microsoft/node-pty/blob/2473ed2da23df99efe45a702431cfa885e3f5b38/src/unixTerminal.ts#L234-L237

Add ability to override shell via environment

Not everywhere we will have zsh