1.0.0-beta.7

1) Remove optimist in favor of @author.io/arg

This avoids a security issue on minimist, which is an indirect dependency (forty)
(SHA: ff48877ffa377ab6e0ce96c3b29cfee6937f2b4a)

2) fix the `isNaN` sanitizer in `kill(..)`. 

The `isNaN(..)` method returns a boolean, therefore the result of the `typeof isNaN(pid)` expression will always be `"boolean"`, therefore the condition in the if-statement is always truthy.  

The fix is simply to remove the `typeof`. (erik-krogh)
(SHA: 5a2b38d41007a7b90ac6f7ea147ed18445046e3a)

3) Merge pull request #304 from erik-krogh/patch-1

fix the `isNaN` sanitizer in `kill(..)`. (coreybutler)
(SHA: a6c8b3d090b5117f19cc6ec4092c20446277a4c9)

4) Merge pull request #267 from forty/forty/remove-optimist

Remove optimist in favor of @author.io/arg (coreybutler)
(SHA: 2663a3e50b5182f8ffe193eeaa7d913496c3ad87)

5) Updated dependencies. Remediates optimist vulnerabilities. (coreybutler)
(SHA: 5c6c110ca02819b076f2a6e66032b36b4dae3221)