Fix the prepare_release workflow

File was not added in #114, and the prepare_release workflow depend on
it.

Author: smortex

tasks/vox.rake

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+namespace :vox do
+  desc 'Update the version in preparation for a release'
+  task 'version:bump:full', [:version] do |_, args|
+    abort 'You must provide a tag.' if args[:version].nil? || args[:version].empty?
+    version = args[:version]
+    abort "#{version} does not appear to be a valid version string in x.y.z format" unless Gem::Version.correct?(version)
+
+    puts "Setting version to #{version}"
+
+    data = File.read('Rakefile')
+    new_data = data.sub(/OPENVOX_AGENT_VERSION = "[^"]+"/, %(OPENVOX_AGENT_VERSION = "#{version}"))
+    warn 'Failed to update version in lib/facter/version.rb' if data == new_data
+
+    File.write('Rakefile', new_data)
+  end
+end