Bump tokio from 1.5.1 to 1.8.4 (#245)

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.5.1 to 1.8.4.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](https://github.com/tokio-rs/tokio/compare/tokio-1.5.1...tokio-1.8.4)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
...

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Cargo.lock

@@ -2003,9 +2003,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.5.1"
+version = "1.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd3b82e6e823a9ee7d7f64b08f8ac3d5f08ac988f23157194bd32af3f2f92767"
+checksum = "50dae83881bc9b0403dd5b44ea9deed3e939856cc8722d5be37f0d6e5c6d53dd"
 dependencies = [
  "autocfg",
  "bytes",

Cargo.toml

@@ -39,7 +39,7 @@ strum = { version = "~0.24", features = ["derive"] }
 thiserror = "~1.0"
 tempfile = "~3.2"
 cfg-if = "~1.0"
-tokio = { version = "~1.5", features = ["process", "rt-multi-thread"] }
+tokio = { version = "~1.8", features = ["process", "rt-multi-thread"] }
 futures = "~0.3"
 regex = "~1.5"
 semver = "~1.0"