Add license

Author: riquito

Cargo.toml

@@ -1,8 +1,12 @@
 [package]
 name = "tuc"
+description = "When cut doesn't cut it"
 version = "0.1.0"
 authors = ["Riccardo Attilio Galli <[email protected]>"]
 edition = "2018"
+repository = "https://github.com/riquito/tuc"
+license = "GPL-3.0-or-later"
+readme = "README.md"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html