Merge pull request #1910 from ruby/dependabot/bundler/rexml-3.3.1

Bump rexml from 3.3.0 to 3.3.1

Author: soutaro

Gemfile.lock

@@ -85,7 +85,7 @@ GEM
     rdoc (6.6.3.1)
       psych (>= 4.0.0)
     regexp_parser (2.9.2)
-    rexml (3.3.0)
+    rexml (3.3.1)
       strscan
     rspec (3.13.0)
       rspec-core (~> 3.13.0)