inconvenient BDD snippet

current

```
[ita] it asynchronous
it('${1:description}', function(done) {
    ${0:// body...}
});

[its] it synchronous
it('${1:description}', function() {
    ${0:// body...}
});

[itp] it pending
it('${1:description}');
```

suggest 

`it` => synchronous style
`itc` => callback style asynchronous style
`ita` => async/await style asynchronous style
