Update fixed-hash & uint utilities (#1078)

* [core/primitives] Update crunchy 0.1 => 0.2

* [core/primitives] Update fixed-hash 0.2 => 0.3.0-beta

* [core/primitives] Update `uint` 0.4 => 0.5.0-beta

* [core/state-machine] Fix errors emerged by fixed-hash update

* [core/state-db] Fix errors that emerged from fixed-hash update

* [core/sr-io] Fix errors that emerged from the fixed-hash update

* [core/trie] Fix errors emerged from fixed-hash updates

* [core/trie] Make use of new Hash::as_fixed_bytes_mut method in tests

* [core/sr-primitives] Fix errors emerged from updating fixed-hash

* [core/executor] Fix errors that emerged from fixed-hash update

* [core/test-runtime] Fix errors that emerged from updating fixed-hash

* [core/test-runtime] Fix an error that emerged from fixed-hash update

* [core/transaction-pool] Fix errors that emerged from updating fixed-hash

* Add From<u64> impl for hash types defined in core/primitives

* [core/client/db] Fix errors that emerged from fixed-hash update

* [core/{client/network/rpc}]: Fix errors emerged by fixed-hash update

* [node/{cli/executor/runtime}]: Fix errors emerged by updating fixed-hash

* [core/network]: Fix bug in parsing constant str

* Update Cargo.lock

- Add crunchy 0.2.1
- fixed-hash 0.2.2 => 0.3.0-beta.3
- Add static-assertions 0.2.5
- uint 0.4.1 => 0.5.0-beta.1

* [core/primitives]: Add fixed-hash/rustc-hex feature for FromStr impl

* [core/primitives] No longer provide From<u64> impl for hash types if byteorder support is not enabled

* [core/primitives] Revert to using From impl again in primitives tests

* [core/..] Fix some bugs that emerged by recent fixed-hash updates

* Update a bunch of Cargo.lock files

* [core/state-db] Re-add whitespace between attr and extern crate/mod

* [core/primitives] Fix bug in From<u64> impl for hash types using the wrong feature guard

substrate/core/state-machine/src/overlayed_changes.rs

@@ -371,7 +371,7 @@ mod tests {
 		let changes_trie_storage = InMemoryChangesTrieStorage::new();
 		let mut ext = Ext::new(&mut overlay, &backend, Some(&changes_trie_storage));
 		const ROOT: [u8; 32] = hex!("0b41e488cccbd67d1f1089592c2c235f5c5399b053f7fe9152dd4b5f279914cd");
-		assert_eq!(ext.storage_root(), H256(ROOT));
+		assert_eq!(ext.storage_root(), H256::from(ROOT));
 	}
 
 	#[test]

substrate/core/state-machine/src/proving_backend.rs

@@ -211,7 +211,8 @@ mod tests {
 
 	#[test]
 	fn proof_is_invalid_when_does_not_contains_root() {
-		assert!(create_proof_check_backend::<Blake2Hasher>(1.into(), vec![]).is_err());
+		use primitives::H256;
+		assert!(create_proof_check_backend::<Blake2Hasher>(H256::from_low_u64_be(1), vec![]).is_err());
 	}
 
 	#[test]

substrate/core/state-machine/src/testing.rs

@@ -158,6 +158,6 @@ mod tests {
 		ext.set_storage(b"dog".to_vec(), b"puppy".to_vec());
 		ext.set_storage(b"dogglesworth".to_vec(), b"cat".to_vec());
 		const ROOT: [u8; 32] = hex!("0b41e488cccbd67d1f1089592c2c235f5c5399b053f7fe9152dd4b5f279914cd");
-		assert_eq!(ext.storage_root(), H256(ROOT));
+		assert_eq!(ext.storage_root(), H256::from(ROOT));
 	}
 }

substrate/core/state-machine/src/trie_backend.rs

@@ -212,7 +212,7 @@ pub mod tests {
 
 	#[test]
 	fn storage_root_is_non_default() {
-		assert!(test_trie().storage_root(::std::iter::empty()).0 != H256([0; 32]));
+		assert!(test_trie().storage_root(::std::iter::empty()).0 != H256::repeat_byte(0));
 	}
 
 	#[test]