Fix rdme --version

I think this broke here: 10ab760 when i defaulted to `help`

Author: Dom Harrington

cli.js

@@ -29,7 +29,7 @@ function load(command = '', subcommand = '') {
 }
 
 module.exports = function(cmd, args, opts = {}) {
-  if (opts.version && !cmd) return Promise.resolve(version);
+  if (opts.version && !cmd || cmd === 'help') return Promise.resolve(version);
 
   let command = cmd || '';
   let subcommand;

test/cli.test.js

@@ -17,6 +17,9 @@ describe('cli', () => {
     it('should return version from package.json', () =>
       cli('', [], minimist(['--version'])).then(v => assert.equal(v, version)));
 
+    it('should return version from package.json for help command', () =>
+      cli('help', [], minimist(['--version'])).then(v => assert.equal(v, version)));
+
     // This is necessary because we use --version for other commands like `docs`
     it('should only return version if no command', () =>
       cli('no-such-command', [], minimist(['--version']))