fix broken build

Author: manuca

lib/skunk/cli/options/argv.rb

@@ -26,7 +26,7 @@ def parse # rubocop:disable Metrics/MethodLength
             end
 
             opts.on("-o", "--out FILE", "Output report to file") do |filename|
-              self.output_filename = String(filename)
+              @output_filename = String(filename)
             end
 
             opts.on_tail("-v", "--version", "Show gem's version") do

test/lib/skunk/cli/options/argv_test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "test_helper"
 
 require "skunk/cli/options/argv"