Specify that it is draft 4 that is used in the readme
Specify that it is draft 4 that is used in the readme

https://github.com/Marwes/schemafy/blob/dd0b4fd39f79a2f6d66db8e81a6388e780e63898/src/schema.json#L2

Fixes #5
Marwes/schemafy,Marwes/schemafy