fix vulnerabilities by switching to commander #77
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This is my first PR, and I did this really quick because I needed to use spritesheet.js. I have not tested all the options
There were a number of npm vulnerabilities from packages. I've updated a few, and switched from optimist (which is now deprecated) to commander.
I did a quick check with just basic usage (
node index.js ./assets/*.png
), and that seemed to work. I was hoping you have some automated tests, or that you could take a look.