Fix purge-chain test (#624)

* Fix purge-chain test

* Update Substrate & Polkadot

cumulus/polkadot-parachains/tests/purge_chain_works.rs

@@ -53,8 +53,8 @@ fn purge_chain_works() {
 	{
 		let base_path = run_node_and_stop();
 
-		assert!(base_path.path().join("chains/local_testnet/db").exists());
-		assert!(base_path.path().join("polkadot/chains/dev/db").exists());
+		assert!(base_path.path().join("chains/local_testnet/db/full").exists());
+		assert!(base_path.path().join("polkadot/chains/dev/db/full").exists());
 
 		let status = Command::new(cargo_bin("polkadot-collator"))
 			.args(&["purge-chain", "-d"])
@@ -66,7 +66,7 @@ fn purge_chain_works() {
 
 		// Make sure that the `parachain_local_testnet` chain folder exists, but the `db` is deleted.
 		assert!(base_path.path().join("chains/local_testnet").exists());
-		assert!(!base_path.path().join("chains/local_testnet/db").exists());
+		assert!(!base_path.path().join("chains/local_testnet/db/full").exists());
 		// assert!(base_path.path().join("polkadot/chains/dev").exists());
 		// assert!(!base_path.path().join("polkadot/chains/dev/db").exists());
 	}