fix typos and add option replace

[maximkoretskiy]

@sylvainbaronnet Hi. Thank You for PR. It would be better if

• You create separate PR for grammar improvements.
• You create some tests for option: replace

[sylvainbaronnet]

Hey @maximkoretskiy,

I'm not very familiar with merge request workflow, those automatically merge into one PR. Not sure how to split them...

I will add some test.

[maximkoretskiy]

Can You describe usecase when replace is required?

[sylvainbaronnet]

Not really a use case but a matter of performance : less size / less rules for the same result.

[sylvainbaronnet]

@maximkoretskiy test added (sry for multiple commit)

[sylvainbaronnet]

Thank you very much for the merge, can you push the new version to npm please ?

[maximkoretskiy]

@sylvainbaronnet done)