Add support for `npx`

[raineorshine]

It would be great if this library worked with not just local modules but also npx.

Steps to Reproduce

npx run-func parse-github-url default https://github.com/magic-akari/page-lifecycle

Current Behavior

% npx run-func parse-github-url default https://github.com/magic-akari/page-lifecycle                    ✗
internal/modules/cjs/loader.js:883
  throw err;
  ^

Error: Cannot find module '/private/tmp/temp/parse-github-url'
Require stack:
- /Users/raine/.npm/_npx/1aedd964be30f5cd/node_modules/run-func/index.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:880:15)
    at Function.Module._load (internal/modules/cjs/loader.js:725:27)
    at Module.require (internal/modules/cjs/loader.js:952:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at Object.<anonymous> (/Users/raine/.npm/_npx/1aedd964be30f5cd/node_modules/run-func/index.js:15:20)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32)
    at Function.Module._load (internal/modules/cjs/loader.js:769:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/Users/raine/.npm/_npx/1aedd964be30f5cd/node_modules/run-func/index.js'
  ]
}
npm ERR! code 1
npm ERR! path /private/tmp/temp
npm ERR! command failed
npm ERR! command sh -c run-func "parse-github-url" "default" "https://github.com/magic-akari/page-lifecycle"

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/raine/.npm/_logs/2021-02-22T18_12_47_304Z-debug.log

Expected Behavior

Url {
  protocol: 'https:',
  slashes: true,
  auth: null,
  host: 'github.com',
  port: null,
  hostname: 'github.com',
  hash: null,
  search: null,
  query: null,
  pathname: 'magic-akari/page-lifecycle',
  path: 'magic-akari/page-lifecycle',
  href: 'https://github.com/magic-akari/page-lifecycle',
  filepath: null,
  owner: 'magic-akari',
  name: 'page-lifecycle',
  repo: 'magic-akari/page-lifecycle',
  branch: 'master',
  repository: 'magic-akari/page-lifecycle'
}

[DVLP]

Modules like parse-github-url should work directly with npx instead. I'll keep this issue open in case of more interest in such functionality

[DVLP]

I published initial support for npm modules in V3. They must be installed as dependencies as remote modules are out of scope of run-func.

If i.e. parse-github-url is in dependencies then a script run-func parse-github-url default https://github.com/magic-akari/page-lifecycle should work
btw parse-github-url works directly in npx as it should npx parse-github-url https://github.com/magic-akari/page-lifecycle