`node examples/revs.js` gives errors

```
[abramowi@Marcs-MacBook-Pro-2 cli-table]$ node examples/revs.js
┌──────┬─────────────────────┬─────────────────────────┬─────────────────┐
│ Rel │ Change │ By │ When │
├──────┼─────────────────────┼─────────────────────────┼─────────────────┤
│ v0.1 │ Testing something … │ rauchg@gmail.com │ 7 minutes ago │
├──────┼─────────────────────┼─────────────────────────┼─────────────────┤
│ v0.1 │ Testing something … │ rauchg@gmail.com │ 8 minutes ago │
└──────┴─────────────────────┴─────────────────────────┴─────────────────┘
┌──────┬─────────────────────┬─────────────────────────┬─────────────────┐
│ Rel │ Change │ By │ When │
├──────┼─────────────────────┼─────────────────────────┼─────────────────┤
│ v0.1 │ Testing something … │ rauchg@gmail.com │ 7 minutes ago │
│ v0.1 │ Testing something … │ rauchg@gmail.com │ 8 minutes ago │
├──────┼─────────────────────┼─────────────────────────┼─────────────────┤
│ v0.1 │ Testing something … │ rauchg@gmail.com │ 8 minutes ago │
└──────┴─────────────────────┴─────────────────────────┴─────────────────┘
/Users/abramowi/dev/git-repos/cli-table/lib/index.js:51
if (options.rows) {
^

TypeError: Cannot read property 'rows' of undefined
at new Table (/Users/abramowi/dev/git-repos/cli-table/lib/index.js:51:15)
at Object. (/Users/abramowi/dev/git-repos/cli-table/examples/revs.js:43:22)
at Module._compile (internal/modules/cjs/loader.js:1072:14)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1101:10)
at Module.load (internal/modules/cjs/loader.js:937:32)
at Function.Module._load (internal/modules/cjs/loader.js:778:12)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:76:12)
at internal/main/run_main_module.js:17:47
```

It looks lie maybe the headless tables aren't working? Because if I comment out the `headless_table` and `vertical_table` stuff, then the code runs without errors.