chore: Update Rexml to 3.4.2 to resolve dependabot alert (#265)

Author: mattcreaser

scripts/Gemfile

@@ -2,7 +2,7 @@ source "https://rubygems.org"
 
 gem "fastlane"
 gem "addressable", ">= 2.8.0"
-gem "rexml", ">= 3.3.9"
+gem "rexml", ">= 3.4.2"
 
 plugins_path = File.join(File.dirname(__FILE__), 'fastlane', 'Pluginfile')
 eval_gemfile(plugins_path) if File.exist?(plugins_path)

scripts/Gemfile.lock

@@ -183,7 +183,7 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.3.9)
+    rexml (3.4.4)
     rouge (2.0.7)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)