feat: psp22 trait contract example with drink tests

pop-api/examples/fungibles/Cargo.toml

@@ -15,7 +15,7 @@ drink = { package = "pop-drink", git = "https://github.com/r0gue-io/pop-drink" }
 env_logger = { version = "0.11.3" }
 serde_json = "1.0.114"
 
-# TODO: due to compilation issues caused by `staging-xcm` this dependency (with specific
+# TODO: due to compilation issues caused by `sp-runtime` this dependency (with specific
 #  version) has to be added. Will be tackled by #348, please ignore for now.
 sp-runtime = { version = "=38.0.0", default-features = false }
 staging-xcm = { version = "=14.1.0", default-features = false }