add providers trends graph url link generator

bin/providers-trends.ts

+#!/usr/bin/env node
+import { PUPPET_DEPENDENCIES } from '../src/puppet-config'
+
+async function main () {
+  const puppetNameList = Object.keys(PUPPET_DEPENDENCIES)
+  const publicNameList = puppetNameList.filter(name => /^[^@]/.test(name))
+  const urlPath = publicNameList.join('-vs-')
+  const url = 'https://www.npmtrends.com/' + urlPath
+  console.info(url)
+}
+
+main()
+  .catch(console.error)