Merge pull request #216 from rspec/dependabot/bundler/rexml-3.3.9

Bump rexml from 3.3.6 to 3.3.9

Author: JonRowe

Gemfile.lock

@@ -126,8 +126,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.6.0)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rouge (3.28.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -140,7 +139,6 @@ GEM
     slim (4.1.0)
       temple (>= 0.7.6, < 0.9)
       tilt (>= 2.0.6, < 2.1)
-    strscan (3.1.0)
     temple (0.8.2)
     thor (1.2.1)
     tilt (2.0.10)