Texture ID is only set when composite parent is true.

[emilebergeron]

When trying to create a Tilemap using an array of baseTextures, I noticed that the .tile() function would always render the first texture, regardless of the index I gave it. Digging into the issue, I noticed that the textureId (https://github.com/pixijs/tilemap/blob/123f8530c10bb1de790346d435ad65345ce8b2ae/src/Tilemap.ts#L491C22-L491C22) is only set when compositeParent is true, otherwise it stays at a value of 0 and always picks the first sprite.

I manage to work around the issue by using one of two methods:

1. Pull the ID assignation out of the if statement, assigning it the texture index
2. Manually set composite parent to true (not really sure of the implications of this)

I was wondering if this was a bug of if I was just not using the library properly. If it is indeed a bug, I can make a PR applying one of the two fixes I found.