Merge pull request #234 from rabbitmq/dependabot/bundler/rexml-3.2.8

Bump rexml from 3.2.5 to 3.2.8

Author: michaelklishin

Gemfile.lock

@@ -77,8 +77,10 @@ GEM
       racc (~> 1.4)
     public_suffix (4.0.7)
     racc (1.7.3)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     ruby-macho (2.5.1)
+    strscan (3.1.0)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
     tzinfo (2.0.6)