alias 'ipfs files ls' to 'ipfs ls'

Author: JonKrone

src/cli/commands/files.js

@@ -1,6 +1,7 @@
 'use strict'
 
 const print = require('../utils').print
+const lsCmd = require('./ls')
 
 module.exports = {
   command: 'files <command>',
@@ -10,6 +11,7 @@ module.exports = {
   builder (yargs) {
     return yargs
       .commandDir('files')
+      .command(lsCmd)
   },
 
   handler (argv) {