Code clean up, & update to latest version of Deno.

[rmalcomber]

Wanted to use this library, and seems not much has changed recently.

• Removed Deno.emit as deprecated, and now use bundle from emit library.
• Replaced Deno.run as that will be deprecated in Deno 2.0, now using Deno.Command
• Updated unit tests to the latest dependencies, and previous changes.
• Added deps.ts file for import/export of libraries dependencies.
• Slight code clean up to stop linter yelling.

Note: Only tested on Linux (Ubuntu)