feat: psp22 trait contract example with drink tests

Cargo.toml

@@ -15,7 +15,11 @@ license = "Unlicense"
 repository = "https://github.com/r0gue-io/pop-node/"
 
 [workspace]
-exclude = [ "extension/contract", "pop-api", "tests/contracts" ]
+exclude = [
+	"extension/contract",
+	"pop-api",
+	"tests/contracts",
+]
 members = [
 	"integration-tests",
 	"node",

pop-api/examples/fungibles/Cargo.toml

@@ -1,12 +1,23 @@
 [package]
-authors = [ "[your_name] <[your_email]>" ]
+authors = [ "R0GUE <[email protected]>" ]
 edition = "2021"
 name = "fungibles"
 version = "0.1.0"
 
 [dependencies]
-ink = { version = "5.0.0", default-features = false }
-pop-api = { path = "../../../pop-api", default-features = false, features = [ "fungibles" ] }
+ink = { version = "=5.0.0", default-features = false, features = [ "ink-debug" ] }
+pop-api = { path = "../../../pop-api", default-features = false, features = [
+	"fungibles",
+] }
+
+[dev-dependencies]
+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
+#  version) has to be added. Will be tackled by #348, please ignore for now.
+staging-xcm = { version = "=14.1.0", default-features = false }
 
 [lib]
 path = "lib.rs"