Update types.ts

[lifeiscontent]

data is never undefined, and in typescript it should be Partial for better merging mechanics.

Checklist:

• If this PR is a new feature, please reference an issue where a consensus about the design was reached (not necessary for small changes)
• Make sure all of the significant new logic is covered by tests
• If this was a change that affects the external API used in GitHunt-React, update GitHunt-React and post a link to the PR in the discussion.

[abenhamdine]

data is never undefined, and in typescript it should be Partial for better merging mechanics.

data should have been undefined when no data is available, and it will probably be fixed in next version, see #3388