raducal

fix extendGrid breakpoint issue

1

Hi I've experienced a couple of issues when using extendGrid and thought I'd try fixing them Issue 1: Passing in a number or string value when extending the grid causes...

I noticed [blockMappings](https://github.com/PrismarineJS/minecraft-data/blob/master/data/bedrock/1.19.1/blockMappings.json) are only available in bedrock v1.19.1. It would be great to add it to other versions