Bump bincode from 1.3.3 to 2.0.1

Bumps [bincode](https://github.com/bincode-org/bincode) from 1.3.3 to 2.0.1.
- [Release notes](https://github.com/bincode-org/bincode/releases)
- [Commits](bincode-org/bincode@v1.3.3...v2.0.1)

---
updated-dependencies:
- dependency-name: bincode
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -13,7 +13,7 @@ edition = "2018"
 travis-ci = { repository = "dalance/prosafe_exporter" }
 
 [dependencies]
-bincode      = "1"
+bincode      = "2"
 combine      = "3"
 failure      = "0.1"
 lazy_static  = "1"