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/palette/system/rpc/Cargo.toml

@@ -20,4 +20,4 @@ transaction_pool = { package = "substrate-transaction-pool", path = "../../../cl
 [dev-dependencies]
 test-client = { package = "substrate-test-runtime-client", path = "../../../test/utils/runtime/client" }
 env_logger = "0.7.0"
-futures03 = { package = "futures-preview", version = "=0.3.0-alpha.19" }
+futures = "0.3.1"

substrate/palette/system/rpc/src/lib.rs

@@ -119,7 +119,7 @@ where
 mod tests {
 	use super::*;
 
-	use futures03::executor::block_on;
+	use futures::executor::block_on;
 	use test_client::{
 		runtime::Transfer,
 		AccountKeyring,