Update ethereum types to 0.8.0 version (#11139)

* Ethereum types updated to 0.8 version

* Fix for rand usage in rpc

* Cargo lock fixed after rebase

* TODO added

util/network-devp2p/Cargo.toml

@@ -23,12 +23,12 @@ ethcore-io = { path = "../io", features = ["mio"] }
 parity-bytes = "0.1"
 crypto = { package = "parity-crypto", version = "0.4.0"}
 network = { package = "ethcore-network", path = "../network" }
-ethereum-types = "0.6.0"
+ethereum-types = "0.8.0"
 ethkey = { path = "../../accounts/ethkey" }
 rlp = "0.4.0"
 parity-path = "0.1"
 ipnetwork = "0.12.6"
-keccak-hash = "0.2.0"
+keccak-hash = "0.4.0"
 parity-snappy = "0.1"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"