Add necessary fields

Author: savannstm

Cargo.toml

@@ -1,7 +1,14 @@
 [package]
 name = "rpgm-asset-decrypter-lib"
 version = "1.0.0"
-edition = "2024"
+authors = ["savannstm <savannstm@gmail.com>"]
+edition = "2018"
+rust-version = "1.56.0"
+description = "A library for decrypting/encrypting RPG Maker MV/MZ audio and image assets."
+documentation = "https://docs.rs/rpgm-asset-decrypter-lib"
+readme = "README.md"
+repository = "https://github.com/savannstm/rpgm-asset-decrypter-lib"
+license-file = "LICENSE.md"
 
 [dev-dependencies]
 png = "0.17.16"