Allow creation without the `new` keyword about decimal.js

[josdejong]

You can always create your own wrapper function and use that, like:

function decimal(value: string | number | Decimal) : Decimal {
  return new Decimal(value)
}

// now you can use:
decimal(5)

// instead of:
new Decimal(5)

[MikeMcl]

This issue has been raised before, I think.

There was some problem with it but I can't remember what it was.

[frec-kenneth]

I had a search through the repos, but I didn't see a specific mention. I don't know Typescript well enough to assert that it's non-problematic, so happy to close this issue if necessary. If someone has more certainty though, would love to learn.

Thanks for taking a look.

[MikeMcl]

@frec-kenneth

Leave the issue open and I'll investigate further.