Bump crossbeam-channel from 0.2.4 to 0.4.4dependabot/cargo/crossbeam-channel-0.4.4

Bumps [crossbeam-channel](https://github.com/crossbeam-rs/crossbeam) from 0.2.4 to 0.4.4.
- [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
- [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crossbeam-rs/crossbeam/compare/v0.2.4...crossbeam-channel-0.4.4)

---
updated-dependencies:
- dependency-name: crossbeam-channel
  dependency-type: direct:production
...

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

2 files changed, 129 insertions, 236 deletions

diff --git a/Cargo.lock b/Cargo.lock
index e8714c1..6c72f42 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,515 +1,408 @@
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diff --git a/Cargo.toml b/Cargo.toml
index 051fb3d..ebac49b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,7 +29,7 @@ opt-level = 3
 
 [dependencies]
 byteorder = "1"
-crossbeam-channel = "0.2.4"
+crossbeam-channel = "0.4.4"
 csv = "1"
 csv-index = "0.1.5"
 docopt = "1"