feat: add default width to Deno implementation

[shadowspawn]

Just a small improvement. Use Deno.consoleSize to supply default value for column width.

• https://deno.land/[email protected]?unstable&s=Deno.consoleSize

Noted in: #132 (comment) and was included in closed #140

[bcoe]

@shadowspawn still something you'd like to land?

[shadowspawn]

Yes thanks, I'll resolve conflicts hopefully in next few days or so.

[shadowspawn]

I did a bunch of hacking about with this again, but questioning whether worthwhile.

• the Deno support for Node.js libraries is now very good
• Deno has moved on from deno.land to JSR

I wonder if the better direction than landing this PR is to confirm Deno works fine with npmjs published cliui and perhaps drop the separate Deno code and publish!

[shadowspawn]

Note to self, declaration for fixing standard and tsc complaints about Deno global being undefined:

declare const Deno: typeof globalThis.Deno