Bump github.com/golangci/golangci-lint from 1.38.0 to 1.39.0 in /tools (#717)

Bumps [github.com/golangci/golangci-lint](https://github.com/golangci/golangci-lint) from 1.38.0 to 1.39.0.
- [Release notes](https://github.com/golangci/golangci-lint/releases)
- [Changelog](https://github.com/golangci/golangci-lint/blob/master/CHANGELOG.md)
- [Commits](golangci/golangci-lint@v1.38.0...v1.39.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tyler Yahn <[email protected]>

Author: dependabot[bot]

tools/go.mod

@@ -4,6 +4,6 @@ go 1.13
 
 require (
 	github.com/client9/misspell v0.3.4
-	github.com/golangci/golangci-lint v1.38.0
+	github.com/golangci/golangci-lint v1.39.0
 	golang.org/x/tools v0.1.0
 )