I going through the "Ruby's Adventure: 2D Beginner" [tutorial](https://learn.unity.com/tutorial/world-design-tilemaps?projectId=5c6166dbedbc2a0021b1bc7c#5cdd60deedbc2a12d5ac2bde), chapter 4, section 3. In the tutorial you create a folder for tiles and you are then supposed to right-click in the asset folder and select "Create > Tile" from the menu. There's even a screenshot showing the menu where the option is right below the sprite sections.
However, in version 2019.11 of unity, there is no such option :) 

I checked the documentation, and for 2019.3 and 2020.1 the [manual](https://docs.unity3d.com/2019.3/Documentation/Manual/Tilemap-CreatingTiles.html) states that this should be possible via the assets menu   (there's no docs for 2019.11 specifically), but my Unity editor doesn't have the option.

It seems unlikely that the option is just missing from my version, so I'm guessing something about my project setup is wrong. Is there anything special I need to set up to have the project support tiles?