Upgrade from futures-preview to futures 0.3.1, and remove futures 0.1 where currently possible (#4083)

* Migrate node and node-template

* Migrate srml

* Simple changes

* Add async-std for interval

* Fix test-runtime warning

* Small changes

* move futures01 in core/rpc to dev-deps

* Change wasm CI builds

* Switch to async-std 1.0.1

* Remove async-std dep of network

* Add modified lockfile

* Fix node cli browser build

* Remove authority-discovery async-std dep

* Add Send + Sync to interval dyn stream

substrate/client/rpc/api/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2018"
 [dependencies]
 codec = { package = "parity-scale-codec", version = "1.0.0" }
 derive_more = "0.15.0"
-futures03 = { package = "futures-preview", version = "0.3.0-alpha.19", features = ["compat"] }
+futures = { version = "0.3.1", features = ["compat"] }
 jsonrpc-core = "14.0.3"
 jsonrpc-core-client = "14.0.3"
 jsonrpc-derive = "14.0.3"

substrate/client/rpc/api/src/helpers.rs

@@ -15,7 +15,7 @@
 // along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
 
 use jsonrpc_core::futures::prelude::*;
-use futures03::{channel::oneshot, compat::Compat};
+use futures::{channel::oneshot, compat::Compat};
 
 /// Wraps around `oneshot::Receiver` and adjusts the error type to produce an internal error if the
 /// sender gets dropped.