Merge pull request switch2osm#264 from switch2osm/dependabot/bundler/rexml-3.3.6

Bump rexml from 3.3.5 to 3.3.6

Author: Firefishy

Gemfile.lock

@@ -244,7 +244,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.3.5)
+    rexml (3.3.6)
       strscan
     rouge (3.30.0)
     rubyzip (2.3.2)