Merge pull request #58 from pytroll/dependabot/bundler/rexml-3.3.9

Bump rexml from 3.3.8 to 3.3.9

Author: mraspaud

Gemfile.lock

@@ -251,7 +251,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.3.8)
+    rexml (3.3.9)
     rouge (3.30.0)
     rubyzip (2.3.2)
     safe_yaml (1.0.5)