build(deps-dev): bump rexml from 3.3.1 to 3.3.2

Bumps [rexml](https://github.com/ruby/rexml) from 3.3.1 to 3.3.2.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.3.1...v3.3.2)

---
updated-dependencies:
- dependency-name: rexml
  dependency-type: indirect
...

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

Gemfile.lock

@@ -276,7 +276,7 @@ GEM
  responders (3.1.1)
  actionpack (>= 5.2)
  railties (>= 5.2)
- rexml (3.3.1)
+ rexml (3.3.2)
  strscan
  rollbar (3.5.2)
  rspec-core (3.13.0)