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/node/cli/Cargo.toml

@@ -7,10 +7,10 @@ build = "build.rs"
 edition = "2018"
 
 [dependencies]
-log = "0.4"
-tokio = "0.1.7"
-futures = "0.1"
-exit-future = "0.1"
+log = "0.4.8"
+tokio = "0.1.22"
+futures = "0.1.29"
+exit-future = "0.1.4"
 jsonrpc-core = "13.2.0"
 cli = { package = "substrate-cli", path = "../../core/cli" }
 codec = { package = "parity-scale-codec", version = "1.0.0" }
@@ -21,7 +21,7 @@ inherents = { package = "substrate-inherents", path = "../../core/inherents" }
 node-runtime = { path = "../runtime" }
 node-rpc = { path = "../rpc" }
 node-primitives = { path = "../primitives" }
-hex-literal = "0.2"
+hex-literal = "0.2.1"
 substrate-rpc = { package = "substrate-rpc", path = "../../core/rpc" }
 substrate-basic-authorship = { path = "../../core/basic-authorship" }
 substrate-service = { path = "../../core/service" }
@@ -35,12 +35,12 @@ grandpa_primitives = { package = "substrate-finality-grandpa-primitives", path =
 sr-primitives = { path = "../../core/sr-primitives" }
 node-executor = { path = "../executor" }
 substrate-telemetry = { package = "substrate-telemetry", path = "../../core/telemetry" }
-structopt = "0.2"
+structopt = "0.2.0"
 transaction-factory = { path = "../../test-utils/transaction-factory" }
 keyring = { package = "substrate-keyring", path = "../../core/keyring" }
 indices = { package = "srml-indices", path = "../../srml/indices" }
 timestamp = { package = "srml-timestamp", path = "../../srml/timestamp", default-features = false }
-rand = "0.6"
+rand = "0.7.2"
 finality_tracker = { package = "srml-finality-tracker", path = "../../srml/finality-tracker", default-features = false }
 contracts = { package = "srml-contracts", path = "../../srml/contracts" }
 system = { package = "srml-system", path = "../../srml/system" }
@@ -49,7 +49,7 @@ support = { package = "srml-support", path = "../../srml/support", default-featu
 im_online = { package = "srml-im-online", path = "../../srml/im-online", default-features = false }
 sr-authority-discovery = { package = "srml-authority-discovery", path = "../../srml/authority-discovery", default-features = false }
 authority-discovery = { package = "substrate-authority-discovery", path = "../../core/authority-discovery"}
-serde = { version = "1.0", features = [ "derive" ] }
+serde = { version = "1.0.101", features = [ "derive" ] }
 client_db = { package = "substrate-client-db", path = "../../core/client/db", features = ["kvdb-rocksdb"] }
 offchain = { package = "substrate-offchain", path = "../../core/offchain" }
 
@@ -58,9 +58,9 @@ keystore = { package = "substrate-keystore", path = "../../core/keystore" }
 babe = { package = "substrate-consensus-babe", path = "../../core/consensus/babe", features = ["test-helpers"] }
 consensus-common = { package = "substrate-consensus-common", path = "../../core/consensus/common" }
 service-test = { package = "substrate-service-test", path = "../../core/service/test" }
-futures03 = { package = "futures-preview", version = "0.3.0-alpha.18" }
-tempfile = "3.1"
+futures03 = { package = "futures-preview", version = "0.3.0-alpha.19" }
+tempfile = "3.1.0"
 
 [build-dependencies]
 cli = { package = "substrate-cli", path = "../../core/cli" }
-structopt = "0.2"
+structopt = "0.2.0"