Use keyword argument in place of a hash for I18n.t() calls

Fixes #290

Author: stephenreay

lib/vagrant-hostmanager/action/update_guest.rb

@@ -17,9 +17,7 @@ def initialize(app, env)
 
         def call(env)
           if @config.hostmanager.manage_guest?
-            env[:ui].info I18n.t('vagrant_hostmanager.action.update_guest', {
-              :name => @machine.name
-            })
+			  env[:ui].info I18n.t('vagrant_hostmanager.action.update_guest', name: @machine.name)
             @updater.update_guest(@machine)
 
             @app.call(env)

lib/vagrant-hostmanager/config.rb

@@ -49,15 +49,15 @@ def validate(machine)
         # check if aliases option is an Array
         if  !machine.config.hostmanager.aliases.kind_of?(Array) &&
             !machine.config.hostmanager.aliases.kind_of?(String)
-          errors << I18n.t('vagrant_hostmanager.config.not_an_array_or_string', {
+          errors << I18n.t('vagrant_hostmanager.config.not_an_array_or_string', **{
             :config_key => 'hostmanager.aliases',
             :is_class   => aliases.class.to_s,
           })
         end
 
         if !machine.config.hostmanager.ip_resolver.nil? &&
            !machine.config.hostmanager.ip_resolver.kind_of?(Proc)
-          errors << I18n.t('vagrant_hostmanager.config.not_a_proc', {
+          errors << I18n.t('vagrant_hostmanager.config.not_a_proc', **{
             :config_key => 'hostmanager.ip_resolver',
             :is_class   => ip_resolver.class.to_s,
           })
@@ -72,7 +72,7 @@ def validate(machine)
       def validate_bool(key, value)
         if ![TrueClass, FalseClass].include?(value.class) &&
            value != UNSET_VALUE
-          I18n.t('vagrant_hostmanager.config.not_a_bool', {
+          I18n.t('vagrant_hostmanager.config.not_a_bool', **{
             :config_key => key,
             :value      => value.class.to_s
           })