Merge pull request #19 from icpc-jag/dependabot/bundler/function/rexml-3.4.2

Bump rexml from 3.3.9 to 3.4.2 in /function

Author: hanazuki

function/Gemfile.lock

@@ -99,7 +99,7 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.3.9)
+    rexml (3.4.2)
     ruby2_keywords (0.0.4)
     rubyntlm (0.6.3)
     signet (0.15.0)