add test-utils feature to polkadot-node-core-pvf (#2989)

* add test-utils feature to polkadot-node-core-pvf

* Update Cargo.lock

* Fix Cargo.lock

* Revert Cargo.lock updates

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update Substrate and Polkadot

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update lockfile

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Marcin S <marcin@realemail.net>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

cumulus/test/relay-validation-worker-provider/Cargo.toml

@@ -8,7 +8,7 @@ build = "build.rs"
 [dependencies]
 
 # Polkadot
-polkadot-node-core-pvf = { git = "https://github.com/paritytech/polkadot", branch = "master" }
+polkadot-node-core-pvf = { git = "https://github.com/paritytech/polkadot", branch = "master", features = ["test-utils"] }
 
 [build-dependencies]
 toml = "0.7.6"