Support importing via deno #136

Problem

Currently, Deno imports default to browser.js, because Deno imports use URLs like a browser. browser.js reports "no color" because Deno's user-agent doesn't look like Chromium. Deno is a runtime like Node.js, so index.js is ideal. Using a Deno-friendly CDN, such as esm.sh, index.js would transpile fine.

Solution

Add "deno" to the exports map in the package.json.

{
  "exports": {
     "node": "./index.js", 
        "deno": "./index.js",
     "default": "./browser.js"
  }
}