Merge pull request #626 from srobo/dependabot/bundler/rexml-3.3.9

Author: dependabot[bot]

Gemfile.lock

@@ -74,16 +74,14 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rouge (3.30.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    strscan (3.1.0)
     thor (0.20.3)
     typhoeus (1.4.1)
       ethon (>= 0.9.0)