Bump which from 4.3.0 to 4.4.0 (#801)

Bumps [which](https://github.com/harryfei/which-rs) from 4.3.0 to 4.4.0.
- [Release notes](https://github.com/harryfei/which-rs/releases)
- [Commits](https://github.com/harryfei/which-rs/compare/4.3.0...4.4.0)

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

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

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

Cargo.lock

@@ -4188,9 +4188,9 @@ dependencies = [
 
 [[package]]
 name = "which"
-version = "4.3.0"
+version = "4.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c831fbbee9e129a8cf93e7747a82da9d95ba8e16621cae60ec2cdc849bacb7b"
+checksum = "2441c784c52b289a054b7201fc93253e288f094e2f4be9058343127c4226a269"
 dependencies = [
  "either",
  "libc",

testing/integration-tests/Cargo.toml

@@ -34,4 +34,4 @@ tokio = { version = "1.8", features = ["macros", "time"] }
 tracing = "0.1.34"
 tracing-subscriber = "0.3.11"
 wabt = "0.10.0"
-which = "4.0.2"
+which = "4.4.0"

testing/test-runtime/Cargo.toml

@@ -12,5 +12,5 @@ codec = { package = "parity-scale-codec", version = "3.0.0", default-features =
 [build-dependencies]
 subxt = { path = "../../subxt" }
 tokio = { version = "1.8", features = ["macros", "rt-multi-thread"] }
-which = "4.2.2"
+which = "4.4.0"
 jsonrpsee = { version = "0.16.0", features = ["async-client", "client-ws-transport"] }