• I have searched the Issues to see if this bug has already been reported
• I have tested the latest version

Steps to reproduce

1. Use the Timeline.Content component and configuring the theme to change the styling
2. The style is applied only when horizontal prop is "true"

Current behavior

Currently, the Timeline.Content component, when passing the styles from the theme, is not taking properly the styles because they are only applied in horizontal.

Example:
This is an example of the same theme used on horizontal and in vertical

This is my theme object

Horizontal:

Vertical:

As you can see, the border from the box is only applied when horizontal prop is true

Expected behavior

Both horizontal and vertical options apply the root base from content

Context

Right now, when using the Timeline component, you can add a child which is Timeline.Content which is basically the content inside each item, but this is only letting change the style when using it in horizontal.