update Cargo.toml for crates.io

Cargo.toml

@@ -1,9 +1,15 @@
 [package]
 name = "rsbkb"
-version = "1.6.0"
+version = "1.6.0-beta"
 authors = ["Raphaël Rigo <[email protected]>"]
 edition = "2018"
 rust-version = "1.70"
+description = "rsbkb has multiple tools which are designed to be called directly (through symlinks). This allows various operations on data to be chained easily like CyberChef but through pipes."
+license-file = "LICENSE"
+readme = "README.md"
+repository = "https://github.com/trou/rsbkb"
+keywords = ["encode", "decode", "hack"]
+categories = ["command-line-utilities"]
 
 [profile.release]
 overflow-checks = true