Merge pull request #106 from sangria-graphql/dependabot/bundler/rexml-3.3.9

Bump rexml from 3.3.3 to 3.3.9

Author: yanns

Gemfile.lock

@@ -221,8 +221,7 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.3.3)
-      strscan
+    rexml (3.3.9)
     rouge (3.19.0)
     ruby-enum (0.8.0)
       i18n
@@ -238,7 +237,6 @@ GEM
       faraday (> 0.8, < 2.0)
     simpleidn (0.1.1)
       unf (~> 0.1.4)
-    strscan (3.1.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)