Bump golang.org/x/sys from 0.5.0 to 0.6.0

Bumps [golang.org/x/sys](https://github.com/golang/sys) from 0.5.0 to 0.6.0.
- [Release notes](https://github.com/golang/sys/releases)
- [Commits](golang/sys@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: golang.org/x/sys
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

go.mod

@@ -5,5 +5,5 @@ go 1.15
 require (
 	github.com/google/go-cmp v0.5.9
 	github.com/hashicorp/go-version v1.6.0
-	golang.org/x/sys v0.5.0
+	golang.org/x/sys v0.6.0
 )