Upgrade dependencies whenever “easy” (#3556)

* Update all dependencies

* Upgrade dependencies whenever “easy”

“easy” means that there are no major changes required.

* Fix build and bump paste dependency to 0.1.6

* Remove dead code

* Re-add = dependency for futures-preview

* Add missing std features for runtime-io

* Remove git dependencies

as updated versions have been published to crates.io

* try to debug bug

* For sr-io, "std" should imply "no_oom" and "no_panic_handler".

Otherwise, rustc complains (correctly) about duplicate lang items.

* Add missing "runtime-io/std" features

* Fix compilation errors

* Prevent duplicate lang items

Rust does not allow duplicate lang items.  When compiled without the
`std` feature, `sr-io` defines two lang items.  Therefore, `sr-io`
compiled without `feature = "std"` must not be linked with `std`.

However, `pwasm-utils` and `wasmi-validation` both bring in `std` unless
compiled with `default-features = "false"`.  This caused a duplicate
lang item error.  Building both with `default-features = "false"`
prevents this error.  When building with `feature = "std"`, they should
both be built with the `std` feature, so this feature needs to be
explicitly depended on.

* Bump `impl_version`

* Make tests pass

Three tests used 1 less gas than they had previously.

* Try to un-break build

* Add a Cargo.lock file

* Revert offchain code

* Revert "Revert offchain code"

This reverts commit d216d08cc6ca0344614669c1d24cde3aa5c0d4e2.

* Don’t try to send a body with a GET request

without adding a Transfer-Encoding or Content-Length header.

This has always been wrong, but hyperium/hyper#1925 hid the bug until
hyper was upgraded to 0.12.35.

* Change some more GET requests to POST requests

* Fix excess line width and remove an `extern crate`

* Delete commented-out extern crate

Co-Authored-By: Sergei Pepyakin <sergei@parity.io>

* Fix regression in Cargo.toml files

dev-dependencies need `default-features = false`, too.

* Bump parity-wasm dependency

* Bump `futures-preview`

* Apply suggestions from code review

Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com>

* Update Cargo.lock files

* Apply suggestions from code review

Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com>

* Update core/service/src/chain_ops.rs

Co-Authored-By: Sergei Pepyakin <sergei@parity.io>

substrate/core/sr-version/src/lib.rs

@@ -188,10 +188,10 @@ mod apis_serialize {
 		seq.end()
 	}
 
-	pub fn serialize_bytesref<S>(apis: &&super::ApiId, ser: S) -> Result<S::Ok, S::Error> where
+	pub fn serialize_bytesref<S>(&apis: &&super::ApiId, ser: S) -> Result<S::Ok, S::Error> where
 		S: Serializer,
 	{
-		bytes::serialize(*apis, ser)
+		bytes::serialize(apis, ser)
 	}
 
 	#[derive(Deserialize)]
@@ -228,9 +228,8 @@ mod apis_serialize {
 	pub fn deserialize_bytes<'de, D>(d: D) -> Result<super::ApiId, D::Error> where
 		D: de::Deserializer<'de>
 	{
-		let bytes = bytes::deserialize_check_len(d, bytes::ExpectedLen::Exact(8))?;
 		let mut arr = [0; 8];
-		arr.copy_from_slice(&bytes);
+		bytes::deserialize_check_len(d, bytes::ExpectedLen::Exact(&mut arr[..]))?;
 		Ok(arr)
 	}
 }