Merge pull request #40 from cryptimeleon/dependabot/bundler/rexml-3.3.3

Bump rexml from 3.2.8 to 3.3.3

Author: JanBobolz

Gemfile.lock

@@ -75,8 +75,8 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
+    rexml (3.3.3)
+      strscan
     rouge (3.26.0)
     ruby2_keywords (0.0.4)
     safe_yaml (1.0.5)