Add support for http ports

[vansosnin]

Add support for ports. I have a case: run swagger on localhost:5000. And now I have an error:

❌ "Error: getaddrinfo ENOTFOUND localhost:5000"
Error: � version missing from schema; specify whether this is OpenAPI v3 or v2 https://swagger.io/specification
    at swaggerVersion (C:\Users\isosnin\AppData\Roaming\npm-cache\_npx\38628\node_modules\@manifoldco\swagger-to-ts\dist-node\index.js:126:9)
    at swaggerToTS (C:\Users\isosnin\AppData\Roaming\npm-cache\_npx\38628\node_modules\@manifoldco\swagger-to-ts\dist-node\index.js:352:19)
    at C:\Users\isosnin\AppData\Roaming\npm-cache\_npx\38628\node_modules\@manifoldco\swagger-to-ts\bin\cli.js:48:18
    at processTicksAndRejections (internal/process/task_queues.js:97:5)

This PR fixes issue.

[vansosnin]

@drwpow ping

[selbekk]

Would love to see this merged and released.

[nathanstanford2]

This looks like a good fix to me. Definitely something I need as well. I tried to review it for you, but I guess since I'm not on the team I can't actually review it haha! Would love to see this release go out.

[drwpow]

Hey, sorry—in the last couple months I’ve left Manifold and no longer have admin access to this repo or the npm deployment. I was the primary author/maintainer of this project. I had been talking with Manifold about the future of this project, but we never reached any conclusions. Let me ping them again.

Worst case scenario, this gets forked somewhere else and development continues as normal. Thanks for your patience!

[drwpow]

Thanks for the fix, but I merged in order and this was already handled in #252 (and #289). Will go out in the next release!