feat: add .map() method

[snowyu]

Make life more easy:

const tokensWithPOS = doc.tokens().map(token => ({token: token.out(), pos: token.out(its.pos)}))

[CLAassistant]

All committers have signed the CLA.

[sanjayaksaxena]

Many thanks for your contribution @snowyu. We will review the PR shortly and accordingly merge.

[sanjayaksaxena]

The following line remains not covered by tests:

Would it possible for you to include test cases for the same?

Running npm run test will help you validate via coverage details generated under the coverage directory.

Thank you.

[snowyu]

Ok, done.

[sanjayaksaxena]

LGTM :)

[sanjayaksaxena]

Published version 2.4.0 on npm as well. Documentation update remains.