Add Keep link as post processing method

[jee-r]

• PR is based on the DEVELOP branch
• Don't send big changes all at once. Split up big PRs into multiple smaller PRs that are easier to manage and review
• Read the contribution guide

Hi,
I hope I didn't make too many mistakes, the python workflow is very new to me.
Please don't hesitate to tell me what I did wrong if I did, I'd like to learn how to do things right thank you.

Related to this issue #6654

[medariox]

Great PR, thank you!

Please update the test snapshots with yarn test -u.

[medariox]

Please remove the version

[p0psicles]

An entry in the changelog.md would be nice

[jee-r]

You'r right @p0psicles as well as updating the wiki but i don't know how edit the wiki

Should i add an entry in changelog.md under the Unreleased section ? like this :

## Unreleased

#### New Features
-  Add Keep link as post processing method ([6654](https://github.com/pymedusa/Medusa/issues/6654))

#### Improvements

#### Fixes

-----

## 0.3.15 (2020-04-13)

... etc

Btw @medariox is my last commit good ?

edit:
I see some changes on the develop branch since my last commit. What am I supposed to do and how ?
Sorry if my question is stupid this is really new to me.
Thank's

[p0psicles]

Changelog is good!
You can PR the wiki.
I think the PR looks good. But @medariox is more into that part of the code

[p0psicles]

No need to merge develop.
Only required when there are conflicts

[p0psicles]

We link the number of the pr in the change log. Not the issue

[medariox]

Awesome work, thanks! A Wiki entry is highly appreciated.