Merge pull request #17 from np-complete/dependabot/bundler/rexml-3.3.9

Bump rexml from 3.3.6 to 3.3.9

Author: masarakki

Gemfile.lock

@@ -14,11 +14,9 @@ GEM
       rouge
       rubyzip
       tty-logger
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rouge (4.3.0)
     rubyzip (2.3.2)
-    strscan (3.1.0)
     tty-color (0.6.0)
     tty-logger (0.6.0)
       pastel (~> 0.8)