Add option to disable numeric conversion for arguments

[micalevisk]

Original issue by @whitlockjc at https://github.com/substack/minimist/issues/36

const argv = require('minimist-lite')(process.argv.slice(2))
console.dir(argv)

If I invoke my command using my-command 2.3, I end up with something like this:

{ _: [ 2.3 ] }

I realize if this was an option I could use opts.string to tell minimist to treat my option as a string but looks like there's no way to achieve the same for argument.

What I expect instead:

{ _: [ '2.3' ] }

[micalevisk]

I do agree with this comment

Implicit coercing for the rest arguments is not a good default and should be off by default.

Thus we can add this new option using false by default, and then changing it to true in the next major relase.

[meszaros-lajos-gyorgy]

I would vote on keeping the original behavior just to not introduce a breaking change, but having an option to control that is definitely a good idea.

[micalevisk]

I believe this will fix this other issue: https://github.com/substack/minimist/issues/112

$ node example/parse.js 002e1234
{ _: [ Infinity ] }