Make sp_core and sp_runtime dependencies optional, and bump to latest (#760)

* begin porting over traits; remove Config use of Hash

* port over the Header bits that we need

* sp_core_hashing where possible, move Verify to PairSigner, remove unused errors

* tidy up Config things and move related bits into one place

* fix codegen

* copy Era over

* move AccountId, Address, Signer to Signer trait and a pass over fixing examples

* impl MultiAddress, MultiSignature, AccountId32 and add back to Config (for decoding later)

* Copy over StorageKey, StorageData, StorageChangeSet

* subxt core compiling with no sp_core or sp_runtime

* Get examples compiling

* pass over fixing tests

* cargo fmt

* clippy tweaks and update polkadot.rs

* fix codegen docs

* port over special DigestItem encoding/decoding

* clippy and doc fixes

* cargo fmt and example fix

* more cargo fmt-ing...

* substrate-extra to substrate-compat

* cargo.toml comments

* simplify PairSigner trait bounds

* move RPC types to a separate file

* fix docs

* Add some tests for things and other PR feedback

* bump to latest sp deps

* avoid needing substrate-compat feature in a test

testing/integration-tests/src/storage/mod.rs

@@ -9,6 +9,7 @@ use crate::{
     utils::wait_for_blocks,
 };
 use sp_keyring::AccountKeyring;
+use subxt::utils::AccountId32;
 
 #[tokio::test]
 async fn storage_plain_lookup() -> Result<(), subxt::Error> {
@@ -32,7 +33,7 @@ async fn storage_map_lookup() -> Result<(), subxt::Error> {
     let api = ctx.client();
 
     let signer = pair_signer(AccountKeyring::Alice.pair());
-    let alice = AccountKeyring::Alice.to_account_id();
+    let alice: AccountId32 = AccountKeyring::Alice.to_account_id().into();
 
     // Do some transaction to bump the Alice nonce to 1:
     let remark_tx = node_runtime::tx().system().remark(vec![1, 2, 3, 4, 5]);
@@ -43,7 +44,7 @@ async fn storage_map_lookup() -> Result<(), subxt::Error> {
         .await?;
 
     // Look up the nonce for the user (we expect it to be 1).
-    let nonce_addr = node_runtime::storage().system().account(&alice);
+    let nonce_addr = node_runtime::storage().system().account(alice);
     let entry = api.storage().fetch_or_default(&nonce_addr, None).await?;
     assert_eq!(entry.nonce, 1);
 
@@ -90,8 +91,8 @@ async fn storage_n_map_storage_lookup() -> Result<(), subxt::Error> {
     // we "approveTransfer" of some of this asset class. This gives us an
     // entry in the `Approvals` StorageNMap that we can try to look up.
     let signer = pair_signer(AccountKeyring::Alice.pair());
-    let alice = AccountKeyring::Alice.to_account_id();
-    let bob = AccountKeyring::Bob.to_account_id();
+    let alice: AccountId32 = AccountKeyring::Alice.to_account_id().into();
+    let bob: AccountId32 = AccountKeyring::Bob.to_account_id().into();
 
     let tx1 = node_runtime::tx()
         .assets()
@@ -111,7 +112,7 @@ async fn storage_n_map_storage_lookup() -> Result<(), subxt::Error> {
         .await?;
 
     // The actual test; look up this approval in storage:
-    let addr = node_runtime::storage().assets().approvals(99, &alice, &bob);
+    let addr = node_runtime::storage().assets().approvals(99, alice, bob);
     let entry = api.storage().fetch(&addr, None).await?;
     assert_eq!(entry.map(|a| a.amount), Some(123));
     Ok(())