Add some keyword and categories to Cargo.toml, and point license to EUPL

Cargo.toml

@@ -1,14 +1,15 @@
 [package]
 name = "async-stomp"
 version = "0.5.0"
-description = "Unofficial successor to Asynchronous streaming STOMP client"
+description = "An asynchronous streaming STOMP client"
 authors = ["Mattias Eriksson <[email protected]>"]
 original-authors = ["Alex Whitney <[email protected]>, Jens Walter <[email protected]>, Alexander Kunde <[email protected]>"]
 repository = "https://github.com/snaggen/async-stomp"
 homepage = "https://github.com/snaggen/async-stomp"
-keywords = ["stomp", "tokio", "streaming"]
+keywords = ["stomp", "tokio", "streaming", "async"]
 license = "EUPL-1.2"
 readme = "README.md"
+categories = ["network-programming", "parser-implementations"]
 edition = "2021"
 
 [dependencies]

README.md

@@ -80,4 +80,4 @@ async fn main() -> Result<(), std::io::Error> {
 
 For full examples, see the examples directory.
 
-License: [EUPL](LICENSE)
+License: [EUPL](LICENSE.EUPL)