Add license to Cargo.toml

Author: sdfgeoff

Cargo.toml

@@ -3,6 +3,7 @@ name = "blender_bevy_toolkit"
 version = "0.1.0"
 authors = ["Geoffrey Irons <[email protected]>"]
 edition = "2018"
+license = "MIT"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html