Load plugins when running linting commands.

Close #705.

Author: fnando

CHANGELOG.md

@@ -11,6 +11,10 @@ Prefix your message with one of the following:
 - [Security] in case of vulnerabilities.
 -->
 
+## Unreleased
+
+- [Fixed] Load plugins when running `i18n lint:*` commands.
+
 ## v4.2.2 - Dec 30, 2022
 
 - [Changed] Do not re-export files whose contents haven't changed.

lib/i18n-js/cli/lint_scripts_command.rb

@@ -80,6 +80,8 @@ class LintScriptsCommand < Command
         end
 
         config = load_config_file(config_file)
+        I18nJS.load_plugins!
+        I18nJS.initialize_plugins!(config: config)
         Schema.validate!(config)
 
         load_require_file!(require_file) if require_file

lib/i18n-js/cli/lint_translations_command.rb

@@ -68,6 +68,8 @@ class LintTranslationsCommand < Command
         end
 
         config = load_config_file(config_file)
+        I18nJS.load_plugins!
+        I18nJS.initialize_plugins!(config: config)
         Schema.validate!(config)
 
         load_require_file!(require_file) if require_file
@@ -82,7 +84,7 @@ class LintTranslationsCommand < Command
                      .map {|key| key.gsub(/^.*?\./, "") }
         end
 
-        default_locale_keys = mapping.delete(default_locale)
+        default_locale_keys = mapping.delete(default_locale) || mapping
 
         if ignored_keys.any?
           ui.stdout_print "=> Check #{options[:config_file].inspect} for " \