Merge pull request #20 from LadnerLab/dependabot/bundler/docs/rexml-3.4.2

Bump rexml from 3.2.5 to 3.4.2 in /docs

Author: jtladner

docs/Gemfile.lock

@@ -246,7 +246,7 @@ GEM
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.4.2)
     rouge (3.26.0)
     ruby-enum (0.9.0)
       i18n