Replace is_string stragglers

Author: spencertransier

lib/fastlane/plugin/wpmreleasetoolkit/actions/android/an_validate_lib_strings_action.rb

@@ -46,7 +46,7 @@ def self.available_options
                                        env_name: 'CHECK_LIBS_STRINGS_PATH',
                                        description: 'The list of libs to merge',
                                        optional: false,
-                                       is_string: false),
+                                       type: Array),
           FastlaneCore::ConfigItem.new(key: :diff_url,
                                        env_name: 'CHECK_LIBS_DIFF_URL',
                                        description: 'The url of the diff to check',

lib/fastlane/plugin/wpmreleasetoolkit/actions/common/create_new_milestone_action.rb

@@ -62,19 +62,19 @@ def self.available_options
                                        env_name: 'GHHELPER_NEED_APPSTORE_SUBMISSION',
                                        description: 'True if the app needs to be submitted',
                                        optional: true,
-                                       is_string: false,
+                                       type: Boolean,
                                        default_value: false),
           FastlaneCore::ConfigItem.new(key: :milestone_duration,
                                        env_name: 'GHHELPER_MILESTONE_DURATION',
                                        description: 'Milestone duration in number of days',
                                        optional: true,
-                                       is_string: false,
+                                       type: Integer,
                                        default_value: 14),
           FastlaneCore::ConfigItem.new(key: :number_of_days_from_code_freeze_to_release,
                                        env_name: 'GHHELPER_NUMBER_OF_DAYS_FROM_CODE_FREEZE_TO_RELEASE',
                                        description: 'Number of days from code freeze to release',
                                        optional: true,
-                                       is_string: false,
+                                       type: Integer,
                                        default_value: 14),
           Fastlane::Helper::GithubHelper.github_token_config_item,
         ]

lib/fastlane/plugin/wpmreleasetoolkit/actions/common/setfrozentag_action.rb

@@ -71,7 +71,7 @@ def self.available_options
                                        description: 'The GitHub milestone',
                                        optional: false,
                                        default_value: true,
-                                       is_string: false),
+                                       type: Boolean),
           Fastlane::Helper::GithubHelper.github_token_config_item,
         ]
       end