fix: make version short flag spec compliant

Signed-off-by: Matthew Peveler <matt.peveler@gmail.com>

Author: MasterOdin

bin/tldr

@@ -7,7 +7,7 @@ const config = require('../lib/config');
 const platform = require('../lib/platform');
 
 program
-  .version(pkg.version)
+  .version(pkg.version, '-v, --version')
   .description(pkg.description)
   .usage('command [options]')
   //