Bump rexml from 3.2.8 to 3.3.6 (#62)

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

Author: dependabot[bot]

Gemfile.lock

@@ -262,7 +262,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.3.4)
+    rexml (3.3.6)
       strscan
     rouge (3.30.0)
     rubyzip (2.3.2)