Update genres in data.js file to be uniform

[brittanyrw]

In the data.js file there are a lot of variations of the same genre. For example, R&B has: r&b, rb, R&B, r-n-b. These should all be r&b.

Update the genres in the data.js file to make sure they are all uniform. All the genres should match a genre in this file: https://github.com/brittanyrw/emojibops/blob/master/genres.md

If a genre is not listed in this file and is included in the data.js file, please delete the genre. Try to replace those genres with one from the data.js file if possible. For example, if alternative-rock is in the data.js file, replace it with rock.

Suggested to do list:

• Remove genres that are not listed in genres.md or replace them with something close.
• Make sure all genres are lowercase with no spaces (use a hyphen instead of a space)
• Make sure all songs have at least one genre.

[dwjohnston93]

Hello Brittany, can I work on this issue?

[brittanyrw]

@dwjohnston93 Sure, I will assign this to you!

[jaas666]

This issue has an open PR #341

Can someone review the PR or update/close the Issue if the requirements changed or is no longer applicable?