Bump rexml from 3.2.6 to 3.4.2 in /android

Bumps [rexml](https://github.com/ruby/rexml) from 3.2.6 to 3.4.2.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](https://github.com/ruby/rexml/compare/v3.2.6...v3.4.2)

---
updated-dependencies:
- dependency-name: rexml
  dependency-version: 3.4.2
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

android/Gemfile.lock

diff --git a/android/Gemfile.lock b/android/Gemfile.lock
index 2fdfbf4..2afca4e 100644
--- a/android/Gemfile.lock
+++ b/android/Gemfile.lock
@@ -154,7 +154,7 @@
     mini_mime (1.1.5)
     multi_json (1.15.0)
     multipart-post (2.3.0)
-    nanaimo (0.3.0)
+    nanaimo (0.4.0)
     naturally (2.2.1)
     optparse (0.1.1)
     os (1.1.4)
@@ -166,7 +166,7 @@
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.2.6)
+    rexml (3.4.2)
     rouge (2.0.7)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
@@ -191,13 +191,13 @@
     unicode-display_width (2.5.0)
     webrick (1.8.1)
     word_wrap (1.0.0)
-    xcodeproj (1.23.0)
+    xcodeproj (1.27.0)
       CFPropertyList (>= 2.3.3, < 4.0)
       atomos (~> 0.1.3)
       claide (>= 1.0.2, < 2.0)
       colored2 (~> 3.1)
-      nanaimo (~> 0.3.0)
-      rexml (~> 3.2.4)
+      nanaimo (~> 0.4.0)
+      rexml (>= 3.3.6, < 4.0)
     xcpretty (0.3.0)
       rouge (~> 2.0.7)
     xcpretty-travis-formatter (1.0.1)