update substrate (#139)

auction/Cargo.toml

auction/src/lib.rs

auction/src/tests.rs

currencies/Cargo.toml

currencies/src/lib.rs

currencies/src/tests.rs

gradually-update/Cargo.toml

gradually-update/src/lib.rs

gradually-update/src/tests.rs

oracle/Cargo.toml

oracle/rpc/Cargo.toml

oracle/rpc/runtime-api/Cargo.toml

oracle/src/lib.rs

oracle/src/tests.rs

prices/Cargo.toml

schedule-update/Cargo.toml

schedule-update/src/lib.rs

schedule-update/src/tests.rs

tokens/Cargo.toml

tokens/src/lib.rs