Bump tokio from 1.14.0 to 1.15.0 (#4537)

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.14.0 to 1.15.0.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](https://github.com/tokio-rs/tokio/compare/tokio-1.14.0...tokio-1.15.0)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

polkadot/Cargo.lock

@@ -10721,11 +10721,10 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.14.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "70e992e41e0d2fb9f755b37446f20900f64446ef54874f40a60c78f021ac6144"
+checksum = "fbbf1c778ec206785635ce8ad57fe52b3009ae9e0c9f574a728f3049d3e55838"
 dependencies = [
- "autocfg",
  "bytes 1.1.0",
  "libc",
  "memchr",
@@ -10740,9 +10739,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-macros"
-version = "1.6.0"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9efc1aba077437943f7515666aa2b882dfabfbfdf89c819ea75a8d6e9eaba5e"
+checksum = "b557f72f448c511a979e2564e55d74e6c4432fc96ff4f6241bc6bded342643b7"
 dependencies = [
  "proc-macro2",
  "quote",

polkadot/node/test/service/Cargo.toml

@@ -11,7 +11,7 @@ hex = "0.4.3"
 tracing = "0.1.29"
 rand = "0.8.3"
 tempfile = "3.2.0"
-tokio = "1.14.0"
+tokio = "1.15.0"
 
 # Polkadot dependencies
 polkadot-overseer = { path = "../../overseer" }
@@ -61,4 +61,4 @@ substrate-test-client = { git = "https://github.com/paritytech/substrate", branc
 pallet-balances = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 serde_json = "1.0.73"
 substrate-test-utils = { git = "https://github.com/paritytech/substrate", branch = "master" }
-tokio = { version = "1.14", features = ["macros"] }
+tokio = { version = "1.15", features = ["macros"] }

polkadot/parachain/test-parachains/adder/collator/Cargo.toml

@@ -44,4 +44,4 @@ substrate-test-utils = { git = "https://github.com/paritytech/substrate", branch
 sc-service = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sp-keyring = { git = "https://github.com/paritytech/substrate", branch = "master" }
 
-tokio = { version = "1.14", features = ["macros"] }
+tokio = { version = "1.15", features = ["macros"] }

polkadot/utils/staking-miner/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2018"
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "2.0.0" }
-tokio = { version = "1.14", features = ["macros"] }
+tokio = { version = "1.15", features = ["macros"] }
 log = "0.4.11"
 env_logger = "0.9.0"
 structopt = "0.3.25"