docs: switch to more modern example of importing

README.md

@@ -46,7 +46,7 @@ npm i yargs@next
 
 ````javascript
 #!/usr/bin/env node
-const argv = require('yargs').argv
+const {argv} = require('yargs')
 
 if (argv.ships > 3 && argv.distance < 53.5) {
   console.log('Plunder more riffiwobbles!')
@@ -137,4 +137,4 @@ Having problems? want to contribute? join our [community slack](http://devtoolsc
 [slack-url]: http://devtoolscommunity.herokuapp.com
 [type-definitions]: https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/yargs
 [coverage-image]: https://img.shields.io/nycrc/yargs/yargs
-[coverage-url]: https://github.com/yargs/yargs/blob/master/.nycrc
+[coverage-url]: https://github.com/yargs/yargs/blob/master/.nycrc