Bump rexml from 3.2.5 to 3.2.8 (#26)

Bumps [rexml](https://github.com/ruby/rexml) from 3.2.5 to 3.2.8.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.2.5...v3.2.8)

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

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

Gemfile.lock

@@ -23,7 +23,8 @@ GEM
     regexp_parser (2.7.0)
     reline (0.3.2)
       io-console (~> 0.5)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rubocop (1.48.0)
       json (~> 2.3)
       parallel (~> 1.10)
@@ -45,6 +46,7 @@ GEM
       rubocop (~> 1.0)
     ruby-prof (1.6.1)
     ruby-progressbar (1.13.0)
+    strscan (3.1.0)
     unicode-display_width (2.4.2)
 
 PLATFORMS