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/test-runtime/Cargo.toml

@@ -6,12 +6,11 @@ publish = false
 
 [dependencies]
 subxt = { path = "../../subxt" }
-sp-runtime = "7.0.0"
+sp-runtime = "12.0.0"
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full", "bit-vec"] }
 
 [build-dependencies]
 subxt = { path = "../../subxt" }
-sp-core = { version = "7.0.0", default-features = false  }
 tokio = { version = "1.8", features = ["macros", "rt-multi-thread"] }
 which = "4.2.2"
 jsonrpsee = { version = "0.16.0", features = ["async-client", "client-ws-transport"] }

testing/test-runtime/build.rs

@@ -47,7 +47,7 @@ async fn run() {
     };
 
     // Download metadata from binary; retry until successful, or a limit is hit.
-    let metadata_bytes: sp_core::Bytes = {
+    let metadata_bytes: subxt::rpc::types::Bytes = {
         const MAX_RETRIES: usize = 6;
         let mut retries = 0;