Vagrantfile in image_optim-0.29.0 vs Vagrantfile in image_optim-0.30.0

@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 Vagrant.configure('2') do |config|
   config.vm.box = 'ubuntu/precise64'
 
-  config.vm.provision 'shell', :inline => <<-SH
+  config.vm.provision 'shell', inline: <<-SH
     set -e
 
     cd /vagrant
 
     echo 'apt-get update...'