Merge pull request #132 from line/dependabot/bundler/rexml-3.4.2

Bump rexml from 3.3.9 to 3.4.2

Author: onevcat

Gemfile.lock

@@ -71,7 +71,7 @@ GEM
     nap (1.1.0)
     netrc (0.11.0)
     public_suffix (4.0.7)
-    rexml (3.3.9)
+    rexml (3.4.2)
     ruby-macho (2.5.1)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)