Bump github.com/briandowns/spinner from 1.13.0 to 1.15.0 (#3)

Bumps [github.com/briandowns/spinner](https://github.com/briandowns/spinner) from 1.13.0 to 1.15.0.
- [Release notes](https://github.com/briandowns/spinner/releases)
- [Commits](briandowns/spinner@v1.13.0...v1.15.0)

---
updated-dependencies:
- dependency-name: github.com/briandowns/spinner
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

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

Author: dependabot[bot]

go.mod

@@ -3,7 +3,7 @@ module github.com/secman-team/version-checker
 go 1.13
 
 require (
-	github.com/briandowns/spinner v1.13.0
+	github.com/briandowns/spinner v1.15.0
 	github.com/secman-team/secman v0.0.0-20210507183205-8a23a96e5322
 	github.com/secman-team/shell v0.3.14
 )