Build(deps-dev): bump xmlrpc from 0.3.3 to 0.3.4

Bumps [xmlrpc](https://github.com/ruby/xmlrpc) from 0.3.3 to 0.3.4.
- [Release notes](https://github.com/ruby/xmlrpc/releases)
- [Changelog](https://github.com/ruby/xmlrpc/blob/master/NEWS.md)
- [Commits](https://github.com/ruby/xmlrpc/compare/v0.3.3...v0.3.4)

---
updated-dependencies:
- dependency-name: xmlrpc
  dependency-version: 0.3.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Gemfile

@@ -37,7 +37,7 @@ gem 'erubis', '~> 2.7'
 # Metasploit Integration extension
 group :ext_msf do
   gem 'msfrpc-client', '~> 1.1', '>= 1.1.2'
-  gem 'xmlrpc', '~> 0.3.3'
+  gem 'xmlrpc', '~> 0.3.4'
 end
 
 # Notifications extension

Gemfile.lock

@@ -290,12 +290,13 @@ GEM
       unicode-emoji (~> 4.1)
     unicode-emoji (4.2.0)
     uri (1.1.1)
-    webrick (1.9.1)
+    webrick (1.9.2)
     websocket (1.2.11)
     websocket-client-simple (0.6.1)
       event_emitter
       websocket
-    xmlrpc (0.3.3)
+    xmlrpc (0.3.4)
+      rexml
       webrick
     xpath (3.2.0)
       nokogiri (~> 1.8)
@@ -353,7 +354,7 @@ DEPENDENCIES
   thin (~> 2.0)
   uglifier (~> 4.2)
   websocket-client-simple (~> 0.6.1)
-  xmlrpc (~> 0.3.3)
+  xmlrpc (~> 0.3.4)
 
 BUNDLED WITH
    2.7.2