Security changes

[cajahyba]

The main change is the removal of 'open' package that was abandoned and now has security issues. I changed to 'opn' one.

[jhult]

@ivelkov, do you plan to merge this?

[JamieMagee]

@cajahyba @jhult This repository appears to be abandoned. If either of you want to fork this project I will contribute patches.

[jhult]

@JamieMagee,

I'm probably not best suited to do this. But, I'm also willing to contribute patches.

One item that we also would likely need to incorporate is the build repo.