[New] named: add commonjs option

[vikr01]

Related: #1145

Adds an option commonjs to named rule, which will check a destructured require statement.

Invalid:

// ./foo.js
export const foo = 'bar';

// ./bar.js
const {baz} = require('./foo');

valid:

// ./bar.js
export const bar = 'foo';
export const foo = 'baz';

// ./baz.js
const {bar} = require('./bar');


// ./foo2.js
const {bar, foo} = require('./bar');

// ./foo3.js
let {bar} = require('./bar'), {foo} = require('./bar');

[coveralls]

Coverage decreased (-0.3%) to 96.948% when pulling b776460 on vikr01:feature/named-require into b4a2f11 on benmosher:master.

[coveralls]

Coverage decreased (-0.3%) to 96.948% when pulling b776460 on vikr01:feature/named-require into b4a2f11 on benmosher:master.

[coveralls]

Coverage decreased (-0.4%) to 96.952% when pulling d13c122 on vikr01:feature/named-require into db471a8 on benmosher:master.