Add flags-related keywords to allow this crate to be easier found on crates.io

Author: Lymia

enumset/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 rust-version = "1.61"
 
 description = "A library for creating compact sets of enums."
-keywords = ["enum", "bitset"]
+keywords = ["enum", "bitset", "flags", "bitflags"]
 categories = ["data-structures"]
 
 documentation = "https://docs.rs/enumset/"