tests(cucumber): add certification

adds certification cucumber test

end2end-tests/tests/cucumber_tests.rs

@@ -201,8 +201,13 @@ async fn certifies(world: &mut DuniterWorld, from: String, to: String) -> Result
 
 // ===== then ====
 
-#[then(regex = r"([a-zA-Z]+) should have (\d+) ĞD")]
-async fn should_have(world: &mut DuniterWorld, who: String, amount: u64) -> Result<()> {
+#[then(regex = r"([a-zA-Z]+) should have (\d+) (ĞD|cĞD)")]
+async fn should_have(
+    world: &mut DuniterWorld,
+    who: String,
+    amount: u64,
+    unit: String,
+) -> Result<()> {
     // Parse inputs
     let who = AccountKeyring::from_str(&who)
         .expect("unknown to")