Use le-table instead

I replaced the ASCII table logic from this module with [`le-table`](https://github.com/IonicaBizau/node-le-table) module.

I published this version of plugin as npm package: `git-issues1`.

```sh
# uninstall git-issues
$ sudo npm uninstall git-issues -g
# install git-issues1
$ sudo npm install git-issues1 -g
```