Add Yarn install to documentation

[HugoFortunato]

Description

Currently, the documentation only shows an installation with NPM. It'd be a good idea to add:

yarn add @brazilian-utils/brazilian-utils

In my case, as I use the Yarn package manager, I had problems using the NPM Install directly. Some problems arose with nonexistent modules and types not found.
I had to delete node_modules and yarn.lock and then reinstall yarn to restore my project.

[hyanmandian]

Nice idea! Can you help us adding this info to our docs?

[HugoFortunato]

For sure! I will do a PR! Ok?

[hyanmandian]

Yes, go ahead!

[LucasCarrias]

How is the status of this request?
I think this can be considered to be added with #110 update.

[hyanmandian]

Can you help us with that @LucasCarrias ?

[LucasCarrias]

@hyanmandian Sure! I'll add that on #110 update.

[hyanmandian]

Closed by #247